Look guys, conventionally speaking if she's slated to perform Rain on Me, they would announce Lady Gaga & Ariana Grande, like how the Grammys announced Lady Gaga & Tony Bennett and Lady Gaga & Metallica for Cheek to Cheek and Moth into Flame. They are usually very clear about this so that you know it's a tribute performance, a collaboration, or a cover. They even made Gaga's Bowie tribute performance very clear and mentioned Bowie's name directly. We know Ariana's name is not an