"Party in the USA"
E! Online readers voted for the Top 20 Most Killer Tunes of 2009.
Keep clicking to see the results, in order. (Congrats, Miley!)
"Poker Face"
"You Belong With Me"
"Single Ladies (Put a Ring on It)"
"Use Somebody"
"I Gotta Feeling"
"My Life Would Suck Without You"
"Fireflies"
"Empire State of Mind"
"3"
"Boom Boom Pow"
"You Found Me"
"Down"
"Whatcha Say"
"1901"
"Right Round"
"I Know You Want Me (Calle Ocho)"
"Crack a Bottle"
"Replay"
"Get On Your Boots"
Next gallery: Best of 2009: Juiciest Scandals!