She’s covered rock classics like Joan Jett’s “I Love Rock N’ Roll” and The Rolling Stones’ “Satisfaction,” but Britney Spears isn’t a real rock star–at least not in Stevie Nicks’ book.

The Fleetwood Mac frontwoman, 60, takes issue with pop tarters, like Britney, who gain instant fame without having to put in the hard work she once did.

“You have to pay your dues to be a real rock star,” she told Extra on Friday. “It’s different in that Britney did not join a band when she was 18 and practice every day for five hours Monday through Friday and then play gigs Friday, Saturday and Sunday.”