On Tuesday's "American Idol" Rock Week with mentor Slash, expectations were high for rockers Adam Lambert and Allison Iraheta. Both singers delivered, offering standout individual performances as well as a crowd-pleasing duet to "Slow Ride."
Lambert's take on Led Zeppelin's "Whole Lotta Love" was the top performance of the night. When Lambert performed first, judge Simon Cowell said he would remain unmatched at the end of the night.
Iraheta's take on Janis Joplin's "Cry Baby" got mixed reviews -- perhaps undeservedly -- but Cowell said the duet with Lambert might have saved the 17-year-old singer.
But the other two finalists, Kris Allen and Danny Gokey, struggled. Allen's take on The Beatles' "Come Together" lacked energy, so much that Cowell compared it to eating ice for lunch.
And while Cowell named Gokey the stronger one in the pair's duet, he wasn't thrilled about his take on Aerosmith's "Dream On." He said Gokey's glory note "was kind of like watching a horror movie."