The new Britney Spears album, Circus, debuted at Number One on the charts, selling more than 500,000 copies in its first week of release. Her record label, Jive, expects that the set will also top next week's charts. The move makes Spears the only artist in Nielsen SoundScan history to have four albums debut with 500,000 copies or more. Music executives close to Spears are chiming in about her latest success. BMG CEO Barry Weiss tells the Associated Press, "This is going to reinforce her icon status. It's not just a Number One album." Her manager, Larry Rudolph, adds, "At the end of the day, I think she is America's pop princess, and the world's pop princess, and this just reconfirms it to everyone who doubted it." Spears' 2007 album, Blackout, moved 290,000 copies in its first week, but it didn't stay on the charts for too long. The 27-year-old pop star will kick off a nationwide tour on March 3rd in New Orleans.