Boxing

Lookin' to make some extra cash during the Floyd vs. Conor fight?? BET ON THE BOOBS ... 'cause Demi Lovato's twins highlight the fight's list of prop bets!!

The cyber-gambling site BetOnline.ag -- one of the biggest gambling sites on the net -- is offering up a bet on whether Demi will show cleavage or cover up the goods during "The Star-Spangled Banner" before the fight.

As of right now ... the odds are definitely pro-boob:

Yes +350 (bet $100 to win $350)

No -500 (bet $500 to win $100)

There's more (not as sexy) bets ... like over/under 1 min 52 seconds for her rendition of the anthem and whether the Biebs and Lil Wayne will make an appearance.

Dominick Cruz is shutting up all the Mayweather vs. McGregor haters at the 11th hour ... saying MayMac is gonna spark an "amazing" change for the UFC and boxing.

MORE SUPERFIGHTS!!

Dom admits a Conor win would be best for UFC superstars like himself ... but tells TMZ Sports we should expect a lot of crossover in the fight game no matter the outcome.

"Either way, this fight is gonna create that type of chemistry between the two combat sports," Cruz said. "I think we're gonna see more superfights from here."

One catch -- Dom told us it's just gonna be MMA fighters trying boxing cause, "I don't think any boxer on Earth is that dumb to come over to us."

Burn.

A bunch of Irish fans of Conor McGregor fired off some F-bombs at Floyd Mayweather's children -- including his 14-year-old daughter -- screaming, "F*ck the Mayweathers."

It all went down right after the weigh-in at T-Mobile Arena in Las Vegas on Friday ... where Floyd's kids were hanging about 30 or 40 yards from a pack of rowdy Conor fans.

You can see Floyd's 17-year-old son, Koraun, in a camouflage TMT shirt mocking the McGregor fans while they yell at the kids, including 14-year-old Jirah, 16-year-old Zion and 17-year-old Iyanna. The kids seems to be enjoying the spectacle!

The fans eventually stopped cussing and flipping the bird -- and started chanting, "Stand up for the boys in green" ... while Koraun continued to dance.

There's a Johnny Manziel connection to the Mayweather vs. McGregor fight -- his fiancee is one of the Corona Girls!

TMZ Sports has learned ... Bre Tiesi (who happens to be a smokin' hot model) was tapped to don the legendary Corona outfit to work Friday's weigh-in festivities.

She did an excellent job!

No word if Johnny plans on heading to Vegas to attend the fight -- or if he's busy training for his NFL comeback.

One thing's for sure ... Bre looks goooood!!!

Conor McGregor was VERY excited about the weigh ... at least judging by the bulge in his pants.

The UFC superstar weighed in at 153 pounds ... while parts of him were hanging off the scale.

Floyd weighed in at 149.5 ... some room to grow.

Congrats to Calvin Klein, the maker of McGregor's underwear, for containing the beast.

Irish eyes are smiling.

Floyd and Conor now have just one date left -- when they square off in Vegas on Saturday night for the super fight.

Ronda Rousey won't be ringside for McGregor vs. Mayweather ... 'CAUSE SHE'LL BE GETTING MARRIED!

Dana White revealed that Ronda will be tying the knot with longtime boyfriend Travis Browne on Saturday. The two got engaged back in April.

White told Rich Eisen he was invited to the wedding but obviously won't be able to attend. Ronda previously announced on "Kelly and Ryan" that the wedding will go down in Hawaii.

As for Ronda's career, Dana says she hasn't retired -- but says she's in a great place and super happy.

Floyd Mayweather is already spending his new fortune -- dropping millions on a brand new red Bugatti, TMZ Sports has learned.

We spoke with Floyd's car guy, Obi Okeke -- aka Doctor Bugatti -- who tells us Floyd hit him up 2 days ago to purchase a "triple red" 2012 Bugatti Grand Sport Convertible.

Obi says the car is "one of one" -- and costs $3.3 MILLION!!

We're told Floyd wanted the car to make a splash on his way to the weigh in for the McGregor fight Friday afternoon.

Floyd's expecting to make around $300 MIL for the fight ... so, what's a couple mil on a new whip, right?

Conor McGregor whispered some words of psychological warfare to Floyd Mayweather during their final face off on Wednesday ... and now we know exactly what he said.

Take a look ... Conor leans in and takes a few quiet, private shots at Floyd.

Floyd responds, "You're a comedian."

Despite the trash talk -- the two men exchange final pleasantries ... quietly wishing each other good luck.

And get this ... the UFC has released new footage from Conor's sparring sessions with Paulie Malignaggi showing the Irish superstar putting a beating on the former champ.

Paulie is now saying he was spying for Floyd the entire time. Hard to spy from the canvas though.

Floyd Mayweather just stepped up the mind games big-time with Conor McGregor -- claiming he and Paulie Malignaggi plotted to have Paulie spy on Conor's camp from the beginning!

"Paulie has always been my friend," Mayweather told FightHype.com ... as Paulie paid a friendly visit to Floyd's Vegas boxing gym. That's when he revealed the spy plot ...

"My friend called me and said, ‘Floyd, do you want me to go to (Conor’s) camp?’ I said, ‘Abso-f*ckin’-lutely.' ... Paulie, thank you for going over there like I asked you to do."

As Floyd talks, Paulie repeatedly says "suckas" -- a shot at McGregor ... and maybe the public for being duped.

Remember ... Paulie was brought into Conor's camp to be a sparring partner -- but bounced after training footage he said made him look bad got released.

Now ... Floyd's saying Paulie's been in his corner all along -- and that his boy is gonna tell him all about Conor's game plan.

“Me and Paulie gonna stay at the house and talk about strategy, we gonna talk about EVERYTHING."

Is he joking? Maybe. Maybe not.

Michael Rapaport has a message for Conor McGregor -- Floyd Mayweather's gonna kick your ass all the way back to Ireland!!!

Rap was sitting front and center at Floyd's training session at his Vegas boxing gym on Thursday night -- where he says it became crystal clear McGregor has no shot on Saturday.

He also blasted Conor for being an obnoxious, style-jacking, culture appropriating poser.

Rapaport also says he saw Demi Lovato at the training session -- and was upset because she didn't look super pumped to be there.

"Why are you here Demi Lovato?! I don't know why you're at the gym. You should be excited that you're at the gym, 'cause that's greatness you're watching, 49-0."

Mayweather/McGregor celeb fans are gonna be screwed out of prime Strip parking if they swoop in last minute ... because Vegas doesn't want the private jet s**t show that went down for Mayweather's last fight of the century.

You'll recall the famous pics of McCarran International Airport tarmacs choked with PJs in 2015 for Mayweather/Pacquiao. That traffic jam taught 'em a lesson. Airport sources tell TMZ, McCarran's implemented a reservation system.

The bad news for latecomers ... the lot's just about full. We're told McCarran is capping the number of birds allowed to park this weekend. Last minute arrivals will still be allowed to land, but will have to bolt after dropping off celebs.

That means anyone looking to flee at a moment's notice will be screwed. Ya can't call 'em to fuel up the jet, if the jet ain't even there. There is a plan B ... reserve parking at one of 2 nearby municipal airports.

Of course, they'd lose the joy of taxiing a G5 past Southwest jets packed with normies, and also would NOT be Strip adjacent -- but even filthy rich beggars can't be choosers.

Don't wanna pay for the Mayweather vs. McGregor fight? Get outta the country.

Seriously!!

A rep for the World Boxing Council tells TMZ Sports the entire country of Mexico will be able to watch Conor and Floyd duke it out fo' free Saturday ... 'cause 2 major TV networks have shelled out a ton of cash to show the fight on open TV.

We're told Televisa and Azteca will both air the fight so viewers won't have to cough up the $100 for Pay-Per-View -- but there's a bit of a catch.

The fight won't air live, so fans will have to wait a couple hours to see it.

Mini Mayweather and Mini McGregor had a pint-sized showdown leading up to their superfight ... and the results were nothing short of amazing!!

The ounce-for-ounce champ Mini Floyd is set to take on Mini Conor Friday ... and although they may be small, their mouths are just as big as their superstar counterparts.

The 3-round fight is set to go down at Larry Flynt's Hustler Club -- just down the road from T-Mobile Arena -- and the expectations are high. Well .. you know what we mean.

Dana White says Floyd Mayweather is full of crap -- and his allegations that Conor McGregor is using illegal tactics to cut weight for the fight are pure fiction.

Early Thursday morning, Mayweather told Ariel Helwani that he had information from a "strong source" that Conor had used 7 IV bags to stay hydrated for Saturday's big fight.

"You know, with the Nevada (Athletic) Commission, that's illegal," Mayweather said.

To be fair, Floyd kept using the words "rumor" and "allegedly" -- but he's a media master and he knows exactly what he's doing by putting that out there.

So, we called White -- who told TMZ Sports there's NOTHING true about Mayweather's claims. Period.

In fact, White pointed to reports that it was FLOYD who was caught up in IV drama before the Manny Pacquiao fight. USADA ultimately said the IV was administered to Floyd before that fight was approved.

But the bottom line ... White says there's no issue with McGregor because he's not using an IV.

Floyd Mayweather Sr. has his son's back in his beef with Justin Bieber -- saying the pop star unfairly kicked Floyd to the curb just because he found God.

As we previously reported, Floyd Jr. is furious with his former friend -- who's been distancing himself after some counseling from his church. Bieber even decided to unfollow Floyd on Instagram as part of a bigger plan to back away from people who don't share the same Christian values.

Enter Floyd Sr. ... who says he doesn't really know if the two will ever be able to bury the hatchet.

He also said Justin needs to be true to himself -- but just because he's a godly man now doesn't mean Floyd has to change.

The message is essentially ... Floyd's still the same guy who had your back in the past -- you shouldn't push him away now.

But will Bieber get an invite to the Mayweather vs. McGregor after-party?

This is what they're fighting for -- in addition to the $400 million -- the official "Money Belt" ... and it's LOADED with gold and diamonds.

We spoke with a rep for the World Boxing Council (WBC) who tells us the belt was specially made for the McGregor vs. Mayweather fight -- and they spared no expense!

We're talkin' 1.5 kilograms of 24k gold (that's roughly 3.3 pounds).

3,360 diamonds placed throughout the piece -- with an additional 600 sapphires and 160 emeralds!

The strap is made from crocodile leather.

It's not the first high-priced belt the WBC has made for a Mayweather fight -- they commissioned a special "Emerald Belt" when Floyd fought Manny Pacquiao ... which was valued at $1 million!