Kellan Lutz lugs AnnaLynne McCord around

Twilight's Kellan Lutz carries his girlfriend, birthday girl AnnaLynne McCord, at the Wet Republic pool at the MGM Grand Hotel/Casino in Las Vegas, Nevada.

DJ Skratchy announced the celebration while the crowd joined in singing "Happy Birthday" to AnnaLynne as a beautiful, tropically decorated three-tier birthday cake was delivered. Friends snapped photos of the birthday girl as she celebrated her big day with a hibiscus-topped Fiji water-themed cake.