By JACKIE WILLIS

February 11, 2013

Justin Bieber, 18, and Justin Timberlake, 32, both shared new songs this weekend, just in time for the biggest night in music, the Grammy Awards. But which track was the best: Timberlake's eight-minute Mirrors tune or Bieber's "unfinished" You Want Me track?

Mirrors has Mr. JT reunited with Timbaland, you may remember their track Cry Me a River, and it includes everything Timberlake/Timbaland fans enjoy -- a great dance beat and easy-to-remember lyrics:

Meanwhile, Bieber had a bit of a battle with Twitter that led to him releasing this rough track that also is bound to get people on the dance floor:

Give both songs a listen and let us know: Which Justin track are you favoring?