On the heels of Prince's electrifying 2007 performance, Petty's 12-minute set, while more staid, was seen by a record 97 million viewers and was so chock-full of familiar hits that he and his band's "Greatest Hits" album notched a 196% sales spike in the week following the game. The Heartbreakers, who played their five songs on a stage shaped like a Gibson Flying V guitar, saw an even more impressive response to the penultimate tune they performed; digital sales of "Free Fallin'" shot up 305% and landed the song at No. 10 on Billboard's Hot Digital Songs chart last February. Perhaps inspiring singalongs in rock-fan living rooms across America, Petty also ran through "American Girl," "I Won't Back Down" and "Runnin' Down a Dream."