Rock icon Stevie Nicks surprised the audience at Broadway's School Of Rock Tuesday night, bringing down the house down with a rousing rendition of "Rhiannon" accompanied by the show's talented young performers.

It was a perfect fit for the music legend: The show, based on the 2003 Jack Black film about an unconventional music teacher and his gifted class, features Nicks' music.

Nicks said it felt "fantastic" playing with the young stars, and gave them high praise: "To be in the presence of these kids that are so amazing that, honestly, sometimes I close my eyes and I’m not sure that it’s not Fleetwood Mac."

The proceeds from the night's performance raised money for Broadway Cares/Equity Fights AIDS, the theater community's leading HIV/AIDS organization.

“It’s not work—it’s just great fun, so it’s a great easy way to make money to give to people that really need it," said the "Edge of Seventeen" singer.

h/t: Page Six