Jimmy Fallon pulled off a surprisingly accurate impression of Justin Bieber on last night's episode of Late Night. In a parody of the teen pop star's hit "Baby," the host goofed on the news that the 17-year-old singer has been hit with a paternity suit by a 20-year-old woman in California. In addition to Fallon's turn as Bieber, Roots emcee Black Thought dropped in for his own spin on Ludacris' guest rap during the middle eight.