Christina Aguilera

Christina Aguilera and Maroon 5 Debut New Single [VIDEO]
Before they were judges on NBC's hit singing competition series 'The Voice,' Adam Levine and Christina Aguilera were chart-topping singers -- and they teamed up to return to their roots Tuesday night, with a performance of their collaborative new single, 'Moves Like Jagger.'
Maroon 5 took the stage f…