Y'all know nothing about singing. She sang it in the same key as Ariana did. The only problem I would say is she sang it too fast and wasn't allowed much breathing space to execute the chorus as flawless as ariana does. She's a dope vocalist nonetheless and she delivered something unique to this cover and I love that she's a fan. Sevyn also needs to release a full length album soon, she is one of the best writers in this generation of R&B.