Clad in an all-yellow ensemble, the "Judas" singer was on-hand for rehearsals for Sting's 25th Anniversary Concert - as the show will benefit the Robin Hood Foundation, which fights poverty in NYC.
Meanwhile, we're also just days away from the release of Gaga's collaboration with Cher on "The Greatest Thing".
Of the much-talked-about track, producer RedOne told MTV, "I think it's timeless. The beautiful thing about this song is, it's very uplifting, very uplifting. It's emotional, but it has dance on it, and it has a dance vibe on it. It's just a timeless song. You can play it with the guitar, the piano, with whatever instrument you want. You can sing it a cappella, you know what I mean, it's that kind of song.
"I'm very excited about that song," RedOne added. "And it's an event. Cher and Lady Gaga: How big can it get?"
