Justin Timberlake Best Friends Challenge

Justin Timberlake is following doctor's orders and resting his voice after a diagnosis of bruising on his vocal cords.  He's postponed multiple concerts on his Man of the Woods tour, disappointing many fans, but the superstar singer refused to cancel his appearance on his BFF Jimmy Fallon's late night show.  So how do you appear on a talk show when you can't talk? You get your wife to join you onstage for a "Who Knows Justin the Best" challenge.