Continuing along with her weekend birthday, Karissa and Kristina Shannon were observed living it up in Las Vegas on the afternoon of Oct. 2. Also be presented with a cake, tweeted Kristina stop, "The Sugar Factory! Thanx for all the candy and cake! LUV" has just been 21-year-old Playboy beauties fell by sugar factory to load up on candy for a boost of energy. As previously reported by gossip center, kicked Shannon twins out of her birthday celebration in NYC on Friday night with a booze-fueled bash at the Green House nightclub after dinner at Via De Mille restaurant.