The cast of Cats are doing the rounds on their press tour, and on Wednesday, they delighted fans with an appearance on The Tonight Show Starring Jimmy Fallon. After Jennifer Hudson brought the house down with her performance on The Voice finale, she was joined by the rest of her costars, Taylor Swift, Jason Derulo, James Corden, and Francesca Hayward, to sing the hit number "Memory" using classroom instruments. While it was certainly a little chaotic at first with people beating on milk bottles and trash cans, Hudson really brings it home as she belts out the chorus. Can we also get a paws up for Derulo's operatic voice? Wow! Watch the video above.