Lady Gaga and Elton John Duet
Lady Gaga's Grammy performance with Elton John is already the most-discussed song of the night, and it hasn't even occurred yet.

All signs point to a duet of epic glam proportions. Elton John did little to dispel the rumors of a joint performance when he appeared at the Sundance Film Festival earlier this week and was quizzed about it. A simple "no" would have quieted down the noise, but the Rocket Man kept hush. UK Metro has said earlier this week that details of a performance were still to be "finalized."

Our friends at Spinner are quick to point out that the 23-year-old pop sensation and the 62-year-old pop legend are already destined to meet face to face again on February 10 at an AmfAR benefit gala honoring John. Gaga will perform at that event so all bets are on a test run during music's biggest night of the year.