Inside Jennifer Lopez's Star-Studded 50th Birthday Party

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J.Lo's birthday party was one to remember!

On Wednesday, Jennifer Lopez celebrated turning 50 at the Star Island neighborhood of Miami Beach, where she partied with family members and her famous friends.

Prior to the party, an eyewitness tells ET that Lopez’s fiance, Alex Rodriguez, had her new Porsche delivered to the [Gloria] Estefan estate at 6 p.m. and presented it to her right away. The car was complete with a custom "JLo" license plate, the eyewitness notes.

According to the eyewitness, Lopez got in the driver’s seat and took it out for a test drive around the block immediately, with her fiance in the passenger seat. "Jennifer was thrilled," the eyewitness says.

At one point, Rodriguez's 14-year-old daughter, Natasha, got in the front seat while Lopez's 11-year-old twins -- Maximilian and  Emme -- sat in the back.

After taking the car out for a spin, the family left to get ready for the party. "The kids were really happy," the eyewitness adds.

Following the fun with the car, a source tells ET that the birthday soiree got underway around 7 p.m. but Lopez and Rodriguez did not arrive until around 9:30 p.m. The couple left the party around 2:30 a.m., according to the source.

Rodriguez took to Instagram to give fans a peek into the lavish bash, sharing a video of Lopez bouncing and grooving along as DJ Cassidy, DJ Khaled and Fat Joe performed.

"TONIGHT was a Jenny from the Block party, and we took it from the Bronx all the way to the 305!!! 🎉 🎊," Rodriguez captioned the clip, referencing the Miami area code.

The 43-year-old former baseball pro, who turns 44 on Saturday, also posted on his Instagram Story, sharing a video of him and Lopez dancing, a pic of his youngest child, 11-year-old Ella, sitting on a swing at the party and an epic fireworks display that closed out the night.

Alex Rodriguez
Instagram
Alex Rodriguez
Instagram
Alex Rodriguez
Instagram

On Thursday's Live With Kelly and Ryan, Ryan Seacrest revealed that, after receiving a "gold and glitzy" e-card invitation, he attended the party, even sharing a sweet video of Rodriguez's epic toast to Lopez.

"A-Rod gets up and makes the most romantic, sweetest speech to Jen in front of everybody, so I'm sucked into the romance movie and I don't want to leave," Seacrest, who was trying to make a flight back to New York that night for work, said on the show. "This was worth the whole trip 'cause it's so beautiful."

In the clip, Rodriguez told Lopez that she's "an inspiration for hundreds of millions of people around the world."

"So from my heart to your heart, I love you," he gushed.

Seacrest also gave some details about the epic bash, revealing that he wasn't initially on the list, but eventually made it inside, where he was the first person to arrive. While he figured he'd easily sneak out of the guest-filled party, he ended up being seated next to the birthday girl, making an early exit challenging.

"We're having a good time, I'm panicked," Seacrest recalled. "The plate comes. On the plate there was prime rib, there was salmon, there was chicken. Your choice. And macaroni and cheese! Jen wanted my mac and cheese."

"And so we talk and eventually I say, 'Thank you, guys. This is lovely. I'm so happy for you. Thanks for being a great friend. Happy for your happiness together. I've gotta go.' She totally understands," Seacrest continued, before sharing the downside to his early exit.  

"I'm going back to the airport. I think, 'Well, I actually stayed for the party. I got to really be there for the party.' I made my flight and then I realize, because of our job, we miss all of the fun. It happened after I left!" he quipped. "I thought the party was over after all of the protein on the plate!"

Other attendees took it upon themselves to post about the rest of the night's fun on social media, showcasing performances from Ashanti, Stevie Mackey, Pia Toscano, Lopez's daughter, Emme, and Lopez herself.

Ashanti
Instagram
Stevie Mackey
Instagram
Emme
Instagram
Alex Rodriguez
Instagram

While tracks including "Jump On It" and Hamilton's "My Shot" were played and performed, guests -- who included the likes of Gloria Estefan -- sipped on three custom cocktails: a raspberry rosemary cosmopolitan martini, a champagne cocktail and a mixed berry, tequila, honey and lime flavored option.

Gloria Estefan
Instagram
JLo
Instagram

Attendees were also treated to a lavish dessert bar -- included cake pops, dipped pretzels, cookies and cupcakes -- as they roamed the room, which was decorated with white flowers, gold accents and loads of draped fabric.

JLo
Instagram
JLo
Instagram

After sharing a sweet kiss with Rodriguez, Lopez danced to 50 Cent's "In Da Club" as an ornately decorated, 10-layer black-and-gold cake was presented that is estimated to have cost over $10,000! The dessert was created by Miami bakery Divine Delicacies Custom Cakes and was vanilla rum-flavored with a dulce de leche filling. A source tells ET that it took five guys to carry out the cake, which was covered in 24-karat edible gold and included the number 50 made out of Swarovski crystals.

 

JLo
Instagram
JLo
Instagram
Jlo
Instagram
Jennifer Lopez Cake
Divine Delicacies Cakes

The blowout came after Rodriguez thoroughly celebrated his bride-to-be with her Porsche convertible and by posting an adorable tribute video.

After the party, Lopez expressed her gratitude to her party guests and fans along with a few more pics.

"It’s been a birthday to remember. I can truly feel the love from all of you. ❤️ Yesterday was a dream," she wrote. "I have watched your beautiful birthday videos and I must’ve cried 20 times. It was just another great reminder of how thankful I am for all the beauty and love I have in my life. Thank you all for being a part of this great feeling! @arod, Benny, @quayaustralia, @prettylittlething and so many more! 🎉🍾🎂 The party continues tonight!!! #itsmypartytour."

Here's more with the birthday girl!

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