Nick Jonas & Patrick Schwarzenegger Celebrate Birthdays in Vegas!

Nick Jonas and Patrick Schwarzenegger pose with their birthday cakes while celebrating their birthdays separately at Hakkasan Restaruant and Nightclub on Friday evening (September 19) in Las Vegas.

The guys were in town the same night as the 2014 iHeartRadio Music Festival, where Nick hit the stage to introduce his friend Ariana Grande‘s performance.

Nick‘s birthday cake was themed around the music video for his new single “Jealous,” which features his girlfriend Olivia Culpo. She was in Vegas with him that night to help celebrate!

Patrick celebrated his 21st birthday that night and he partied with pals while DJ Tiesto spun tunes at the club.

15+ pictures inside of the guys celebrating their birthdays in Vegas…