Bling!

Paris Hilton's monstrous diamond engagement ring is worth about $2 million -- but the crazier part is when Chris Zylka knew she was the one, and ordered the rock.

Celeb jeweler Michael Greene, who designed Paris' multi-million dollar bling, tells TMZ ... Chris reached out to place his order 5 to 6 months ago, back in the summer.

Keep in mind ... Paris and Chris had just gone public with their relationship back in February, so it was likely less than a year into things that he decided he wanted to lock down Paris.

Greene also tells us the huge diamond -- 20 carats strong -- took about 4 months to cut, and the setting only took a couple days. He says Chris came in to get it right before their Aspen ski trip.

We're told Chris was shaking when he picked it up because he was "so nervous." With that kind of hardware in his pocket, we would be too.

Joey Bada$$ found a way to memorialize his late best friend and still look like a baller.

The rapper commissioned a custom piece to honor his boy, Capital STEEZ, who at 19 committed suicide on Christmas Eve 5 years ago. We're told JB hit up celebrity jeweler Mr. Flawless a few months back to make the piece that features 14k gold and VVS diamonds. Final price ... around $50k.

The tedious process included sculpting Capital's face in gold ... a 2-month job. The back features the hip-hop Pro Era group logo "47" ... of which Bada$$ is a member and Capital founded.

Rich the Kid lived up to his name with some new bling ... spending as much as normal folks do on their mortgage.

The New York rapper dropped around -- get this -- TWO. HUNDRED. THOUSAND. DOLLARS. for this pendant to celebrate his hit single, "New Freezer," featuring Kendrick Lamar.

The chain's rose and white gold, but what's blinding you (and feel free to grab some shades) are the 2,790 encrusted diamonds. It's the handy work of Icebox Diamonds & Watches in the ATL.

Joey Bada$$ went gold in 2017, and T-Pain re-emerged with a comeback album ... both worthy celebratory occasions that inspired their record label's CEO to splurge on gold and diamonds.

Jonny Shipes -- CEO of Cinematic Music Group -- dropped $75k for the chains featuring each rapper's logo on the back and the label's logo on the front. The pendant -- encrusted with VS-1 diamonds -- is the handiwork of celebrity jeweler Will Da Boss.

Joey's big 2017 got off to a quick start when his single, "Devastated," earned him his first gold plaque. Not to be outdone, T-Pain released his fifth studio album, "Oblivion" ... his first album in 6 years.

Another reason for the pendants? Creating a chain to join the iconic chain ranks of those from Roc-A-Fella and OVO. Mission accomplished.

Yeah, tensions are high ... but there's one thing Russian and American superstar athletes have in common -- they LOVE expensive jewelry.

Case in point ... Aleksandr Kokorin -- the biggest soccer star in Russia, a 26-year-old striker on the World Cup team.

He's also rich as hell -- and just dropped a cool $100,000 on a custom Rolex watch and diamond necklace combo.

Kokorin hit up Dave Bling and Big Will at DWS Jewelry & Co. in NYC for a "Rainbow Rolly" -- comprised of multicolored VS-1 diamonds on the bezel.

Kokorin issued a statement about the pieces through the jeweler ... saying, "I always want to create something that feels unique to me. This watch reminds me that even though time is expensive and serious, it can also be fun and enjoyable."

Nov. 30 2017 -- A rep for Ivanka's brand adds the licensing deal with Madison Avenue Diamonds was terminated by the Ivanka Trump brand last december.

3:39 PM PT -- A spokesperson for the Ivanka Trump brand tells TMZ, "Madison Avenue Diamonds is owned by a separate party and was a typical licensing deal. This matter involving an independent third party has absolutely nothing to do with the Ivanka Trump brand. In fact, the defendant in question owes the brand a significant amount of money."

Ivanka Trump's jewelry company is being sued for skipping out on its bills.

Raselli Franco, an Italian jeweler who manufactures and sells fine jewelry to retailers, claims he sold Ivanka Trump Fine Jewelry $56,833 in bling. Ivanka's company agreed to pay in 4 installments, but he says they have not paid $21,222.

Franco says he gave Ivanka's company an extension to pay the bill but got zilch.

Ivanka's company began paying a year ago but missed several payment deadlines.

We reached out to Ivanka's rep ... so far no word back.

The couple that bedazzles together ...

Christmas came early for Alex Rodriguez this year ... by way of a blinged-out coffee cup, courtesy of his smokin' hot girlfriend.

After Jennifer Lopez iced out her own coffee mug, she decided she wanted A-Rod to have a matching sipper ... and surprised him with one of the fanciest coffee cups ever -- complete with his company logo.

As we previously reported, Jennifer's cup cost around $600 ... and A-Rod's runs around $500.

You fancy, huh?!

Prince Harry hadn't even finished his proposal when Meghan Markle kept interrupting -- CAN I SAY YES NOW?!

The newly engaged couple dished details about their engagement in an interview with the BBC ... revealing some pretty spectacular details about how it all went down. According to the couple ... the engagement happened a few weeks ago earlier this month at Harry's Nottingham Cottage inside Kensington Palace.

Harry got down on one knee and made his case ... but apparently a way-too-excited Meghan couldn't and wouldn't let him finish before charmingly butting in and asking, "Can I say yes now?" Adorbs.

And check this out ... Harry included 2 diamonds that belonged to his mother, Princess Diana, in Meghan's engagement ring "to make sure that she's with us on this crazy journey together."

Harry and Meghan met about a year and a half ago, but the relationship was turbocharged just 4 weeks into it ... when they headed to Botswana. Turns out, they never went more than 2 weeks without seeing each other. Completely fooled us.

Prince Harry and Meghan Markle made their first public appearance since announcing their engagement.

The couple walked hand-in-hand at Kensington Palace's Sunken Garden and fans gathered outside the gates to cheer them on.

Kensington Palace is where Harry grew up with his parents, Charles and Diana. It's also where William and Kate call home.

As for Meghan's ring ... it's made of 3 stones -- 2 diamonds from Princess Diana's personal collection and a third stone from Botswana where the couple recently went on holiday.

Some friends buy a beer for a friend's birthday, but Future's peeps drop around half a million bucks to get him dripping in diamonds.

The rapper was in Miami and hit up The Forge last weekend for a 34th bday celebration. We're told The Weeknd hooked him up with an icy "Low Life" pendant ... his manager, Ebonie Ward, gave him diamond-crusted dog tags -- and Young Scooter got him a BMFBG piece.

We're told all of the bling was commissioned by Avianne Jewelry in NYC. Elliot Avianne even threw in an awesome Pluto pendant. Bonus! Add in the 2 rings he scored from family members ... and Future's total haul was worth about $500k!!!

So be honest ... what caught your eye first ... Serena Williams' ridiculously cute baby, or her ridiculously big wedding ring?

Serena posted this pic of daughter Alexis Olympia Ohanian Jr. with the caption, "Daddy knows how much I love leopard print."

We're glad Serena posted the pic ... it gives us an excuse to re-post the wedding pics, which are some of the best in 2017.

As for our question ... we'll give you a pass and say you first noticed the baby.

A$AP Ferg's living by his credo ... by sparing no expense on a ring bearing the rapper's famed logo.

We're told Ferg dropped $20k on a new custom-designed 18-karat gold ring, iced up with pink and white diamonds spelling FERG ... made by Will Da Boss of NYC-based DWS and Co. Jewelry.

A$AP tells us he wanted to create something that feels unique to him, and got the ring inscribed with "Sky's Not the Limit" to remind himself of that every time he holds the mic.

Spending a small fortune on bling should help him get his point across too.

Making custom grillz for the whole Astros roster wasn't good enough for Paul Wall ... 'cause he just commemorated the team's first World Series with a HUGE back tattoo!!

Wall rolled through G6 Tattoo Studios in Houston for the fresh ink -- which he showed off on Wednesday with his "World Series Grillz" track bumpin' in the background.

The H-Town MC's got several tats reppin' his civic pride -- but this one's probably the most epic.

Speaking of those grillz ... the 'Stros came through Wall and Johnny Dang's shop recently to get 'em molded -- and word is they're ready for pickup!

Cardi B has a message to haters who don't believe she's really rocking a $500k ring -- just watch me shine!

The "Bodak Yellow" rapper and her fiance, Offset, hit up Ace of Diamonds in WeHo Monday night and we asked her about the Internet trolls claiming her engagement ring's fake because she hasn't been wearing it out ... and she had the best possible response.

She wasn't the only one blinging ... Quavo was also there with a record-setting piece around his neck. Inside the club, the soon-to-be-wedded couple showed some PDA ... with diamonds still shining.

Riff Raff is giving props to fellow H-Town MC Paul Wall for droppin' bank on custom grillz for the Astros -- but he's got 1 minor issue with them ...

THEY'RE TOO BALLER!!

Here's the deal ... Wall promised to make all the World Series champs personal mouth bling in 18-karat gold, which Riff says is dope (and expensive).

But when it comes to grillz, RR told TMZ Sports he rocks with 14 karat 'cause 18s and 24s don't hit the right shade of yellow.

The rapper's more of a shark-teeth-and-diamonds kinda guy ... as you can tell from the glow-in-the-dark joint he had on at In-N-Out.

Joe Jonas and Sophie Turner pulled out all the stops Saturday night for their engagement dinner.

The celebration went down in NYC and lots of people showed up ... brother Nick Jonas, Ansel Elgort from "Baby Driver," film director Justin Ervin, Ashley Graham, Tom Holland and model Georgia Fowler.

Joe and Sophie got engaged 3 weeks ago and she posted a pic of a gigantic rock.

No word on when they're tying the knot.