Christina Aguilera and Flo Rida Sizzle with ‘How I Feel’ on ‘The Voice’

Christina Aguilera showed up and showed out with a sizzling performance on the first live show of "The Voice" Monday night.

Performing "How I Feel," Aguilera brought out Flo Rida.

Watch the performance in full in video below.

"The Voice" airs Monday and Tuesday nights on NBC.