Happy birthday, Justin Timberlake! JT turns 31 today. It's time to say bye, bye, bye to Justin Timberlake's single days. The singer-turned-actor, who rose to heartthrob status with *NSYNC, is reportedly engaged to longtime girlfriend Jessica Biel. It seems like just yesterday I was crushing on the curly haired boy bander thanks to his moves in songs like "Tearing Up My Heart" or sweet love songs like "This I Promise You." Let's remember the good old days now with a look back at his cutest boy band moments.