Demi Lovato and Britney Spears are going to shake things up on the X Factor this fall, so check out these new promos to see them hard at work.

The first video shows some of the most dramatic moments of the first stages of the audtions, and the second one shows Britney Spears giving some pretty harsh critiques.

The second season will start on September 12th at 8 p.m. on Fox.

Sources: Beautiful Ballad, Just Jared