Christina Aguilera & Adam Lambert: Recording a Duet?

Stepping out for promotional duties, Christina Aguilera filmed a spot with "Extra" host Mario Lopez at The Grove in Los Angeles Friday (June 3).

The 30-year-old songstress, (looking super trendy in an animal print top, black skirt, and slingback Louboutin's) judged the final round of a singing competition on the show - which would send the winner to a taping of her show, "The Voice."

Meanwhile, Christina has reportedly made her way into the studio to record a duet with "American Idol" winner Adam Lambert Lambert.

If the rumors are true, the super-talented twosome's track will be showcased on Lambert's upcoming album.

Enjoy the pictures of Christina Aguilera at The Grove in L.A. (June 3).