Christina Aguilera is at it again! For the second week in a row, she left her big, red coache's chair to hit the stage for a performance on The Voice.

This week, she was joined by fellow mentor Blake Shelton to perform their song Just a Fool from Xtina's new album Lotus, which debuted last Tuesday. Unlike her faster tracks like Your Body, the first single, this song is a powerful ballad that the duo performed with simple stage-setting and great emotion.