The cast of Cats [1] are doing the rounds on their press tour [2], and on Wednesday, they delighted fans with an appearance on The Tonight Show Starring Jimmy Fallon [3]. After Jennifer Hudson [4] brought the house down with her performance on The Voice finale [5], she was joined by the rest of her costars, Taylor Swift [6], 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.