Twilight's Nikki Reed and her main man, Paul McDonald, headed to Las Vegas for the weekend to get a jump start on her 23rd birthday. The pair kicked off Friday night with a trip to the Sugar Factory, where Nikki stocked up on candy, and later hit the Gallery Nightclub at Planet Hollywood. Nikki indulged in additional dessert there with her pink and white cake, and Paul added more sweetness with hugs and kisses. Sin City is the latest stop for Nikki Reed and Paul McDonald, who got cozy while watching American Idol last week and also took in a Prince concert together. Nikki's actual birthday is tomorrow, just a few days after her Breaking Dawn costar Robert Pattinson's milestone 25th.