Christina Aguilera (with Melissa McCarthy)
Christina Aguilera joined James to sing a few of her hits like “Fighter” and “Genie in a Bottle.” Melissa McCarthy hops on to nail the Redman rap in “Dirrty.” James asks Christina some fun questions like if he’s ever hooked up with Justin Timberlake, and Christina tries to teach them both how to be divas with bedazzled pink microphones.