10 biggest stars to walk down the 2013 MTV Movie Awards red carpet
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1. Melissa McCarthy
Why she's No. 1: It may have received a drubbing from critics, but "Identity Thief" nevertheless established the "Bridesmaids" breakout's credentials as a comedic leading lady to be reckoned with by grossing more than $150 million worldwide on its release earlier this year. The now-bona fide A-lister is set to continue her winning streak with this summer's "The Heat" co-starring Sandra Bullock.
What she's doing here: Presenting the award for Best Male Performance.