Katy Perry was your hostess with the mostest... wardrobe changes. She came dressed as a hippy, a geek and a cheerleader. Big shocker at the Teen Awards that the Twilight Saga did really really well. Also taking home wins were Salena Gomez, Miley Cyrus, Justin Beiber and Eminem. Click to find out more of the results from the 2010 Teen Choice Awards.