Joe Jonas celebrates his birthday

Joe Jonas turns 22 tomorrow, August 15. However, he has already started his birthday celebration in Las Vegas.

People reports that Jonas was relaxing by the pool with his group of friends at Liquid Pool Lounge.

“Female fans surrounded the area, trying to get a glimpse of [Joe] in his bathing suit," a source reports to People.

After that, Jonas and his friends went to the Bellagio Hotel to eat. They then went to play blackjack at Deuce Lounge. “Joe was swarmed by nearly 20 female fans dying to get an autograph or photo with [him]," a source informs People. “After signing a few autographs and meeting with fans, Joe finally made it to Haze Nightclub where he rocked the crowd with a special live set, performing tracks off of his debut solo album "FastLife."

That night, Celebrity Gossip reports, Jonas performed at Haze Club and even received a cake there. People reports that the cake was in the shape of a keyboard.

“Joe was completely surprised when he was presented with a specialty pre-birthday cake in the shape of a bright colored keyboard,” a source tells People.

Happy birthday, Joe.