The hosts with the most get the ball rolling for the Nashville show.
Adam Levine showed off his Voice...and his hips. Yow!
The country cutie sang the nominees for Best Pop Vocal Album.
"We Are Young," indeed.
The singer let loose on "Let Me Love You (Until You Learn to Love Yourself)."
The singer joined the group for a tribute to Johnny Cash.
Check out all the action from the 2012 Grammy Nominations Concert