https://www.cnet.com/news/ariana-grande-asks-instagram-about-nintendo-switchs-mario-kart-8/

"does anybody know how to play mario kart with a friend from different locations on nintendo switch?" she posted to her story. "pls dm me it's urgent. thank u so much."

Grande must've figured out she needed to exchange friend codes and have a subscription to the Nintendo Switch Online service, since she later posted a shot of the game's globe multiplayer hub.