FILE - In this Thursday, Aug. 23, 2012 file photo, actress, writer and comedienne Rebel Wilson, a cast member in the film "Bachelorette," poses for a portrait at the Four Seasons Hotel in Beverly Hills, Calif. Wilson sings, dances and summons laughs _ and that's just in the opening moments of the upcoming MTV Movie Awards, on Sunday, April 14, 2013. The Australian actress is hosting the show, and she's set to start the ceremony by singing solo. (Photo by Chris Pizzello/Invision/AP, File)CULVER CITY, Calif. (AP) — Rebel Wilson sings, dances and summons laughs — and that's simply within the opening moments of this weekend's MTV Film Awards.