Considering the juice fasts and plastic surgery some celebrities endure before awards shows, Rebel Wilson's preparations are pretty low-key.
"I was joking before to do two sit-ups a day to get in good physical shape," says the host of the 2013 MTV Movie Awards, airing Sunday at 9 p.m.
Wilson, who played Fat Amy in "Pitch Perfect" (for which she's nominated for best female performance and breakthrough performance), is reuniting the women from that movie to sing at the awards.
" 'It would be the first time we have sung together as a group since we have filmed in Louisiana," she says. "It would be pretty epic. It is looking good. Everyone is very busy. We all get on so well. I had my birthday party recently, and all of the girls came."
The awards show is trying a new approach. "It is developing into a live stage show and incorporates movie kind of stuff," Wilson says. "I am writing the whole show, too."
Executive producer Jesse Ignjatovic describes the MTV Movie Awards -- now in its 22nd year -- as "the opposite of the Oscars." He even plans to clock in at the two hours allotted.
Usually these awards are held after Memorial Day, but were moved earlier to coincide with the kickoff of summer blockbusters, which start debuting in May. "As we are acknowledging the work of this year, we are also looking to this summer," Ignjatovic says. "Let's be the first summer blockbuster and be ahead of all the summer blockbusters."
What makes the MTV awards more fun are the quirky categories, including best kiss. This year introduces best shirtless performance, and the nominees are: Channing Tatum ("Magic Mike"), Christian Bale ("The Dark Knight Rises"), Daniel Craig ("Skyfall"), Seth MacFarlane ("Ted") and Taylor Lautner ("The Twilight Saga: Breaking Dawn -- Part 2").
Incidentally, "Ted" racked up seven nominations, quite a feat for a foulmouthed, beer-swigging teddy bear. MacFarlane wrote, directed and voiced "Ted." It's up for movie of the year, best on-screen duo (with Mark Wahlberg), best shirtless performance (Ted in a bubble bath on his cellphone is a vision), best female performance (Mila Kunis), best kiss (Kunis and Wahlberg) and best fight.
As far as fight scenes go, though, it will be tough to beat Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson and Jeremy Renner versus Tom Hiddleston from "Marvel's The Avengers."
Hiddleston, also up for best villain, is thrilled.
"It feels like in some certain circles it is unfashionable to conceive of 'Marvel's The Avengers'] as a piece of real work," Hiddleston says. "I worked on it for 79 days over the summer of 2011, and I am so immensely proud of it because I think it is purely entertaining."