[Aired: April 24, 2017] Nine-year-old twins Max and Emme joined their multi-talented mom, Jennifer Lopez, to make their Ellen debut back in 2017! Then, Jennifer and her "World of Dance" co-judge Derek Hough put on their dancing shoes for an impressive dance-off. SUBSCRIBE: https://ellen.tv/3D6Sewq FOLLOW ELLEN: Instagram - https://www.instagram.com/ellendegeneres/ Facebook - https://www.facebook.com/ellentv/ Twitter - https://twitter.com/ellendegeneres TikTok - https://www.tiktok.com/@ellendegeneres Website - https://www.ellentube.com/ The place for laughs, joy, stars, surprises, and everything Ellen. #ellen #theellenshow #ellendegeneres