Pictures of Shirtless Kellan Lutz and Bikini-Clad AnnaLynne McCord in Las Vegas

Kellan Goes Shirtless For AnnaLynne's Bikini-Filled Birthday Bash!

Kellan Lutz stuck by girlfriend AnnaLynne McCord's side on Saturday to celebrate her 23rd birthday at Las Vegas's MGM Grand. The couple, who are back in the US after a trip to Germany, posed together on the blue carpet before heading over to the pool, where Kellan went shirtless and sipped a Bud Light. AnnaLynne, meanwhile, put on a bikini to dance with her sister Angel. Our Hottest Summer Bikini Body contest continues without AnnaLynne, who was knocked out in the first round by Blake Lively — Blake, though, is still in the running against Jessica Alba, so make sure to fill out your bracket and enter to win an iPhone 4!

To see more from the bash, just read more.