Many were shocked when Sanjaya advanced to the Top 12, while Sundance was sent packing last week. But apparently no one was more shocked than Simon Cowell, who said he'll quit the show, if Sanjaya is crowned the next American Idol.

Simon warned, "He's not going to win. I won't be back if he does!"

Last night, Sanjaya gave another monotone performance, droning out "Ain't No Mountain High Enough" while sporting Justin Guarini's bouncy hair. Simon snarked, "When you hear a wail in Beverly Hills, that is where Diana Ross is watching this show."