AnnaLynne McCord: Birthday Celebrating Bikini Babe

With the party festivities in full swing, AnnaLynne McCord stripped down to show off her bikini body while celebrating her 23rd birthday in Las Vegas, Nevada on Saturday (July 17).

The "90210" hottie was joined at MGM Grand's Wet Republic by her sister, Angel, and actor beau, Kellan Lutz, for the poolside Sin City afternoon fete.

Meanwhile, AnnaLynne continues her best to reach a goal of $60,000 in charitable donations for The Blind Project - as she's made it up to just over $1,000 thus far.

Of the effort, which comes as a birthday wish, Miss McCord tells, "Your donation to The Blind Project will go directly to rescuing and restoring girls out of the commercial sex trade by supporting the Biographe project ."