Christina Aguilera visits Fallon...

This week on The Tonight Show Starring Jimmy Fallon, Christina Aguilera promoted her spot on NBC's 'The Voice,' and participated in some lighthearted fun.
Christina found herself embroiled in a 'Tight Pants' love triangle between Jimmy Fallon and her onscreen husband Will Ferrell. Insults started flying, and Fallon tried his best to suppress his laughter when Ferrell called him a "fat-faced cob nobbler." Loved that part, although I feel she could have thrown on a better wig during the interview portion.