Gaga and Elton John to Perform at Grammys

With five Grammy nominations including Album of the Year, Record of the Year, and Song of the Year, Sunday night is expected to be memorable for Lady Gaga in more ways than one.

Elton John is reportedly surprising viewers by performing with Gaga at this year's 52nd Annual Grammy Awards.

The Lady is set to open the awards show while John is rumored to perform with her. It is not certain if John will help Gaga open the show, as an anonymous source told Metro News. No details had been finalized.

The 62-year-old would not confirm or deny any rumors when asked about the Grammy's at the Sundance Film Festival this week.

The rumored performance is being compared to John's surprise performance with rapper Eminem in 2001.