Expect a surprising number of pole dances on American Idol’s performance show tomorrow night. Miley Cyrus, 17, will be serving as a “guest mentor†for the eleven remaining finalists on the Fox singing competition Tuesday evening. The Queen of the Tweens, who has the upcoming Nicholas Sparks adaptation The Last Song to promote, is younger than all but two of the remaining contestants, who will be singing Billboard No. 1 hits. [LAT]