‘The Voice’: Why Britney Spears Made a Surprise Appearance

Britney Spears made a surprise appearance on ‘The Voice’ on Tuesday, sending a video message to her friend and backup dancer, Willie Gomez, who earned a four-chair turn after his blind audition. ‘The Voice’ airs Mondays at 8 p.m. and Tuesdays at 9 p.m. on NBC.