Greyson Michael Chance Rocks Ellen

Just days before Justin Bieber is set to appear on the Ellen Degeneres show, another young Internet sensation, Greyson Michael Chance, sat down with the talk show host, then rocked her stage.

The 12-year-old came to Ellen's attention because of a breakout performance on YouTube in which he sings Lady Gaga's hit "Paparazzi" at his elementary school.

Chance, who has been studying piano for three years but has never had a vocal lesson, said he also writes his own songs including one about "a wife who dies of cancer and she goes into the stars."

Another original called "Broken Hearts" "was about two girls in particular," says Chance. "I tried to make some pretty powerful hints into it, but I am not going to say their names of course."

"Look what's happening to you now," Ellen quipped. "Now they're sorry."

Ellen also had a big surprise in store for the sixth grader from Edmund, Oklahoma when Lady Gaga herself phoned in.

"Greyson you are so sweet and so talented and I was so excited that you covered 'Paparazzi,'" Gaga told Chance. "Keep following your dreams and work really hard and stay away from girls."

Check out Chance's YouTube Channel.