Miley Cyrus: America's teen sweetheart, or God's gift to vice-squad sting operations? The Hannah Montana gal goes for a grown-up club sound, with Rihanna-style robot-disco thump and boy-crazy AutoTune vocals about how hot she is. She boasts, "I always get a 10, 'cause I'm built like that." If she gets a 10, what does he get — 15 to 20? It's no "Party in the USA" or "See You Again," but the chorus packs plenty of electro-fizz pizzazz.

“1999”

“I don’t consider myself a great poet,” Prince told Rolling Stone. “I just know I’m here to say what’s on my mind.” In the case of the apocalyptic party anthem “1999,” he was worried about then-president Ronald Reagan’s foreign policies. The song’s melody is based on a riff borrowed from the Mamas and Papas’ “Monday, Monday,” and Prince originally envisioned the first verse with three-part harmony but later split the vocals between himself and members of the Revolution. Because Warner Bros., with whom Prince was locked in a contractual battle, owned the original’s masters, Prince rerecorded the song and appropriately released that version in 1999.