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AnnaLynne McCord is the sexiest siren of them all!

The 90210 hottie was in Vegas over the weekend, taking the stage at the Christian Audigier nightclub for "Sirens of TI" - a 5th anniversary celebration of the star attraction at the Treasure Island hotel. Damn, wish we saw this performance up close and personal!

Seriously, this girl is flat-out gorgeous. A total stunner. There's got to be SOMETHING wrong with her!