Adam Lambert's American Idol Perfomance

Depending on whom you ask, American Idol frontrunner Adam Lambert is either the new Elvis Presley or the next Zac Efron. And, surprisingly, one of the two superstars was indeed in the building at tonight's elimination show. (That would be Zac Efron, of course.)

The High School Musical star was on hand to promote his new movie, 17 Again, which opens this Friday. The final seven Idol contestants were treated to the movie's premiere the night before and taped their experience for a segment on tonight's show.

Read on to find out how the crowd reacted to Adam and Zac and whose making a comparison to the King...