Fleetwood Mac frontwoman Stevie Nicks has blasted Britney Spears - insisting the pop singer has never had to work hard for her career.

Nicks, whose hedonistic lifestyle in the 1970s and 80s saw her labeled as one of rock's craziest characters, is not convinced Spears' tumultuous past qualifies her as a real music icon and claims the singer hasn't put in the hours she did as an upcoming artist.

She tells TV show Extra, "You have to pay your dues to be a real rock star. 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."

Spears - who shot to fame as a teenager - successfully relaunched her career in 2008 following a turbulent few years in which she divorced husband Kevin Federline, lost custody of her two sons and was stripped of control over her affairs following a public breakdown.

See more photos of Britney here!

(This news article provided by World Entertainment News Network)