Every Picture That Proves Jennifer Lopez's Big Birthday Celebration Was Basically a Red Carpet Event

You probably couldn't take a step at Jennifer Lopez's 47th birthday celebration in Las Vegas without bumping into an uberfamous celebrity. The sexy "Ain't Your Mama" singer, who simply doesn't age, had all her favorite people in tow for her big day — and they all just happen to be stars.

Kim Kardashian and Calvin Harris were there (what did they talk about?), and of course, BFF Leah Remini and longtime boyfriend Casper Smart. There was also a blast from the past with Fat Joe attending. Even soccer player Cristiano Ronaldo took a break from his post-Euro-2016 vacation to visit the US for Jennifer's gathering.

And because J Lo is J Lo, she partied two days in a row! First wearing a custom Balmain brown dress that showed off her impressive abs a day before her real birthday, and then on Sunday July 10, in a sparkly low-cut blue Zuhair Murad gown at the Nobu Villa at Caesars Palace for a karaoke-filled night. Scroll ahead to see all the Instagram photos from the weekend.