Jennifer Aniston accepts the award for best on-screen dirtbag for her role in Horrible Bosses at the 2012 MTV Movie Awards in Los Angeles.

Los Angeles - Jennifer Aniston is being rewarded for being bad at the MTV Movie Awards.

The actress picked up the best on-screen dirtbag award for her role as a man-eating dentist in Horrible Bosses at the beginning of Sunday's MTV Movie Awards.

Bridesmaids and The Hunger Games are battling for the most buckets of golden popcorn trophies at the show. The raunchy comedy and survival saga are the top nominees at the 21st annual extravaganza with eight nods apiece, including movie of the year.

The live, fan-favourite ceremony is hosted by actor-comedian Russell Brand.

He opened the show by poking fun at Kim Kardashian, “short-lived celebrity marriages” and Charlie Sheen. - Sapa-AP