HOLLYWOOD (AP) – What contestants have said is the toughest week on “American Idol” starts tonight. It’s Hollywood Week.

For the first time, guys will compete against guys and girls will be up against girls. Guys are up first tonight and tomorrow. The girls will compete in the two episodes airing next week.

By the end of the episode airing on Valentine’s Day, 20 guys and 20 girls will move on to the semi-final round.