This might be the BEST Carpool Karaoke I've seen in a while! The one and only Christina Aguilera joined James Corden & belted out all of her BIGGEST hits! While riding with James, she also gave him the low down on her days with Mickey Mouse Club. There is also a surprise guest during this episode but I won't ruin it for you lol. Check it out below! What is your favorite Christina Aguilera song? Let me know @justPEREZplay.