They are both amazing performers. WINNER: Draw. Mariah Carey is the better singer, Jennifer Lopez is the better dancer.
They are both from New York City. WINNER: Jennifer Lopez, because she in actually from the city proper, and named her album after a subway line.
They both wearing shockingly revealing dresses on the red carpet. WINNER: Jennifer Lopez, because that Grammys dress is iconic.
They have both served at judges on American Idol. WINNER: Jennifer Lopez, because she survived more than one season and really helps the show.
They both have twins. WINNER: Mariah Carey, because she posts adorable pics of her babies on Instagram.
They’ve both had critically acclaimed acting roles. WINNER: Mariah Carey was awesome in Precious, but Jennifer Lopez’s Selena is unforgettable.
They’ve both been involved in real stinkers on the big screen. WINNER: Mariah Carey, because at least it’s fun hate-watch Glitter, whereas Gigli offers no such frivolity.
They both had high-profile divorces from powerful men. WINNER: Jennifer Lopez gets married regularly, so Mariah Carey’s split from Tommy Mottola seems more severe.
They both have serious diva reputations and requirements. WINNER: Draw. Both ladies demand all-white dressing rooms filled with all-white flowers.