One of America's favorite guilty pleasures, 'American Idol,' is back on TV screens come Jan. 19. While we know of the major changes going into Season 10, like Simon Cowell's exit from the judging panel along with Ellen DeGeneres and Kara DioGuardi, and that fact that 'Idol' will now be on Wednesday and Thursday nights, there are some changes in format that have been kept a closely guarded secret, until now.

The Hollywood Reporter (THR) released an exclusive article about eight changes in store for the new season, most of which were already reported or just ideas producers were tossing around. Entertainment Weekly (EW) also reported on changes, which were not known previously, and the changes are big ones.

First, the semifinals will conclude with a sudden death top 20 round. Two groups of 10 contestants will compete for the final 12 spots (or 10 or 15, depending on which "inside source" you talk to). That one round will determine the finalists.