The top 12 'American Idol' guys sang live last night...  .

 Two of these guys, plus two of the girls, will be eliminated tonight during a live results show.

Allison Iraheta is making an appearance and Kris Allen will perform.

E! has a wrap-up with VIDEO
Source 2 with VIDEO

Simon Vs. Ellen

TMZ reports that Simon Cowell and Ellen DeGeneres aren't getting along, and the tension is building.

"American Idol" sources say the judges aren't even trying to hide it. Ellen can't stand what she believes is Simon's cruelty toward contestants. And, Simon actually enjoys rubbing her the wrong way.

It all started badly when Simon showed up late for Ellen's first week of 'Idol' taping and made her wait around. The tension has gotten worse.