Alicia Keys Dishes on Her Super Bowl Surprise

Earlier this month Hollywood made the annual migration to Sundance, where ET got Alicia Keys to dish on her upcoming Super Bowl performance.

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Keys was tapped to sing the National Anthem at the big game on February 3, but she's coming with a unique rendition of the classic tune.

"It is actually a brand new song in the style that I'll deliver it," Alicia told us outside of the Acura studios on Main Street. "I'm actually rehearsing it like a maniac ... I'm really excited about it. I can't even lie."

Other stars spotted at the Acura Studio included Joseph Gordon-Levitt, James Franco, Nicole Kidman, Jennifer Hudson and Jessica Alba.

Amanda Seyfried and Peter Skarsgaard chatted with ET at the Sundance premiere of Lovelace, where they rolled up to the red carpet in an Acura MDX.

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"I went all in and I enjoyed myself for the most part," said Seyfried, who plays Linda Lovelace in the film. "I like telling this kind of story."

Lovelace co-star Adam Brody, who accompanied Seyfried and Skarsgaard at the premiere, raved about the film festival, saying, "It's still probably the best place to premiere or showcase a fresh, independent film."

Watch the video for more.