Lady Gaga Plays New Song, Piano Rocker 'You and I'At Elton John's White Tie and Tiara Ball last Thursday in New York City, Lady Gaga graced the crowd with a brand new, rock-tinged piano ballad titled 'You and I.'

"This song is very, very dear to my heart, and I just wrote it," Gaga said in her introduction. "It's a bit of a rock 'n' roll tune, which means it will most likely never get used as one of my singles."

The scantily clad singer gave a beyond-energetic performance, jumping up on the piano bench and pumping her fist, absolutely nailing the tune that "no one's ever heard before ... ever." See the video after the jump!