What's The Big Frigin' Difference?!

Don't let these two almost identical images of Patrick Schwarzenegger and Bella Thorne throw ya down ... pick yourself back up and see if you can uncover the differences between these two super similar shots.

**HINT -- There are THREE differences in the above photographs!**

John Mayer Waiting, Waiting ... On The Valet With A Hug Exchange

John Mayer and Hailey Baldwin hugged it out leaving dinner Thursday night ... but it just seems super friendly.

The duo was joined by other friends including "Boy Meets World" star Danielle Fishel at dinner in the San Fernando Valley. Baldwin had congratulated Fishel who just got engaged, so it could've been the reason for the get together.

032318_hailey_baldwin_kal
TYING THE KNOT

Baldwin has confessed she's a huge John Mayer fan and knows his songs by heart. She even caught his L.A. show last year with pal Kendall Jenner, so talk about the ultimate fangirl supper.

There are rumors Baldwin was dating Shawn Mendes and Mendes is reportedly tight with Mayer, although Mendes wasn't at the dinner.

The only person missing from the shindig who's got connections to all of them ... the Biebs.

Barack Obama I Got a New Move for Ya, Michelle ...

Barack Obama hit it on the nose in New Zealand -- saying hello the right way by pressing his face up against his hosts. No lip locking, of course.

Obama flew solo way down under for a couple meetings, and moments after touching down he got a traditional welcome ... Maori style. At least 3 female tribe members went forehead-to-forehead with the former prez and rubbed noses with him. Think Eskimo kisses, with a Kiwi twist.

44 also got some customary gifts -- 2 whale tooth pendants ... one for him, and one for Michelle. Although, we think she'd settle for some nose-to-nose action with her man.

Just sayin' ...

Model Danielle Knudson A (Tan) Line in the Sand? Yeah, No ...

Danielle Knudson did an oceanside photo shoot for H&M -- but we're not sure what the hell she's advertising ... besides her half-naked body all covered in sand.

The Canadian model hit up a beach in Tulum, Mexico Wednesday for a shoot with the beleaguered Swedish retail company, where she started off in a 2-piece bikini, and ended up topless ... layered with sand ... and on top of some very lucky dude.

We imagine they were showing off some of H&M's swim line -- but it's anyone's guess with how much skin is showing here. At least it ain't "monkey in the jungle" Winter wear again.

Fun fact: it's officially Spring ... which means we're coming up on bikini season! Not-so-fun fact: Danielle is taken ... damn.

Blac Chyna & BF Fri$ky Bu$ine$$

Blac Chyna went on a shopping spree to satisfy her shoe fetish, but her 18-year-old BF didn't come away empty handed, either.

BC, who is 29, and Houston rapper YBN Almighty Jay hit up Saks Fifth Avenue Monday in Bev Hills ... and she beelined it for the women's shoe department to try on multiple pairs of glitzy kicks.

YBN kept busy, holding on to stacks o' cash -- but we don't know if it was his, or if he was just holding for her. He was definitely holding on to BC's famous ass, though.

After some serious PDA, they hopped in BC's Ferrari with huge shopping bags in tow.

#BossCougarsWinning

Von Miller Yacht Party With Bikini Chicks!!

Von Miller was havin' yachts of fun in Miami over the weekend ... partyin' it up on a boat with a BUNCH of bikini-clad chicks ... and we've got the pics!!

TMZ Sports has learned ... the Denver Broncos superstar was posted up outside the Epic Hotel in South Beach on Saturday, soakin' in all the lovely sights of the St. Patrick's Day festivities.

FYI -- Miller's seen wearing the words "Drugs are my Life" on his shirt ... but don't freak out, guys ... it says "Channing University School of Pharmacy" in REALLY tiny letters underneath. Get it?

Miller's got a lot to celebrate ... the Broncos signed quarterback Case Keenum last week. Or maybe it was just the girls.

Yeah ... probably the girls.

Rick Ross Performs In Miami Day After Vegas Comeback

If Rick Ross was in dire straits earlier this month, he didn't show it at all while doing TWO shows this weekend ... on both sides of the country.

A day after his first show since being hospitalized -- Ross jetted back to his hometown of Miami for a performance at LIV on Sunday ... and jumped onstage while he was there. It looked like a packed house ... Lil Wayne, Jason Derulo and rapper Fresh were also there. The place was decked out with signs reading, "Welcome Back Rick Ross."

Coming on the heels of his early Sunday morning gig in Vegas ... the Miami appearance wrapped up a weekend schedule that would be considered busy for anyone -- much less someone recovering from an apparent heart-related emergency.

He's come a long way in less than 3 weeks.

Selena Gomez Sun in Sydney Transplant Scar Evident

Selena Gomez put on a bikini and hopped on a boat in Sydney Harbor over the weekend, and you can clearly see some of the scarring from her kidney transplant.

Gomez soaked up the sun Sunday with some friends -- none of whom were Justin Bieber.

The scar is not located near the kidney, but Selena had complications immediately after her transplant. An artery broke and she had to get emergency surgery where doctors took a vein from her leg and created a new artery to help stabilize the overactive kidney -- hence the big scar on the inside of her right thigh.

Selena was in really bad shape before the transplant, so the scar is, obviously, a small price to pay for another chance at life.