 Four singles were released from the album : " Me Against the Music " , " Toxic " and " Everytime " met international chart success , all peaking at number one in Australia and Ireland and reaching top five positions elsewhere . To promote In the Zone , Spears performed the songs in a number of television appearances and also embarked on The Onyx Hotel Tour . The album and its music videos are largely seen by critics as the end of her transition from teen pop star to a more adult female artist . In 2009 , Amy Schriefer of NPR listed In the Zone as one of The 50 Most Important Recordings of the Decade , calling it " a primer on the sound of pop in the ' 00s " . 
