Exclusive DetailsSofia Richie Had the Most Insane 21st Birthday Bash Ever — See All the Pics!

“Here we go,” the newly-minted 21-year-old captioned a sweet selfie as she embarked on her birthday trip, decked out in pink Chanel realness. Talk about a birthday babe!

Her brand new Aston Martin, gifted to her by boyfriend Scott Disick, was on full display on the tarmac as the crew gathered to fly off to Vegas in their private jet.

Yeah, and in case you were wondering, BFF Kylie Jenner was totally in attendance! She and Sof got into a cute little “dance battle” before getting on the jet, y’all. We love this friendship.

“Here we f—king go,” Sof wrote over a cute video of all of her birthday babes getting ready on the PJ. We’ve got Yris Palmer doing Stassie Karanikolaou‘s lashes, while Ky’s assistant, Victoria Villarroel, got her hair done.

Plus, no Kar-Jenner adjacent trip would be complete without some seriously sick merch. Scott’s brand, Talentless, designed sweet sweatsuits especially for his GF’s big trip. So cute!

Once the crew landed and arrived at their hotel, they were greeted with some goodies! The Wynn Hotel gave Sof the cutest chocolate model of the building. Yum.

And, of course, they gifted her with a branded bottle of booze — the cornerstone to any 21st birthday celebration, no?

But they didn’t stop there! The hotel also gifted Sofia with some jewelry by Bottega Veneta, including this chic gold pendant.

How cute are these Bottega earrings?! Must be nice to get hotel presents on your birthday.

The girls took a cute birthday bunch photo while “doing lunch at Jardin,” a restaurant inside the Wynn … and before all the ~festivities~ began.

Look at that crowd! The girls partied the day away at Encore Beach Club at Wynn Las Vegas, and the entire venue was on fire for her big day.

The birthday girl changed into a sexy red bedazzled Chanel thong bikini with a cover-up skirt and we basically died and went to Heaven on the spot.

Her beau, 36, also came through for the day party, posing for photos with her and lookin’ summer sexy. However, an eyewitness exclusively told Life & Style he maintained a distance from Sof and her friends, hanging with his pal Cooper Mount at another table. He left about an hour into the bash, but he resurfaced later in the evening, don’t worry.

It wasn’t just any DJ for Sof’s party — it was Alesso! Clearly, Yris, 29, is stoked to be in his presence. Plus, during his set, the blonde beauty was saluted with a Champagne Shower fire drill — which one of the club’s signature bottle presentations that involved spraying the entire crowd.

The venue made cut-outs of Sofia from her sexy Frankies Bikinis shoot … and Stassie, 21, danced all up on it.

Ky’s photographer, Amber Asaly, just had to hydrate after getting her dance on. She’d just hit the pole, and trust us, it was fire.

The birthday girl couldn’t stop smiling! We definitely don’t blame her, with all these sexy cut-outs of herself reminding her she’s ~all that~.

There were also cute pillows in their VIP section with Sofia and Scott’s dog, Hershela, on them. So niche.

The venue also made the sweetest “Happy Birthday Sofia” cupcakes.

Clearly, the birthday girl had a blast at her first party of the day. Next, of course, was a spectacular dinner.

The group gathered at Cipriani at Wynn Plaza for a lavish dinner — and our girl Ky was finally in attendance. She didn’t come to hang out for the day party but she was ready to hit the night.

“Little slice of Heaven,” the birthday babe captioned a photo of her pre-club night dessert.

After dinner, the girls made their way to the biggest party of the trip! Sof arrived at XS Nightclub at Wynn Las Vegas after 1 a.m. with Scott and her friends — but Kylie hung back and went to their suite to change.

When the crew arrived, they were greeted by many cocktail waiters with bottles galore as well as a drum procession in her honor! Plus, they gave her a large bottle of Perrier-Jouët rosé.

Though the happy couple snapped a few photos together beforehand, the house-flipper didn’t stay long. Scott left the party before 2 a.m. after a passionate kiss and hug with his lady.

Popular EDM group The Chainsmokers were DJing at the venue that night, so they did the honors of serenading the birthday girl and enlisting the crowd to help out.

At one point, Sofia’s braid fell off and she began whipping it around, so you know the festivities got ~lit~ before Kylie Jenner arrived.

Clearly, that birthday shot didn’t taste too great, but … do they ever?

Look at that incredible six-tier birthday cake!

OK, OK, we know what you’re probably wondering: Was there an afterparty?

Believe it or not, these party animals were actually back on the PJ and headed home by 3 a.m. “And it’s over over people!” Sofia wrote over a video of herself getting back on the plane.

When she got home, there were even more surprises afoot. At first, who sent this huge bouquet of balloons was a mystery …

But they turned out to be from her dear old dad, Lionel Richie. It looks like someone‘s birthday was full of love. Happy happy, Sof!