Tuesday, May 11, 2010 6:05am ET by  

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Christina Aguilera US tour with Leona Lewis

Christina Aguilera has announced that she is to embark on a "global tour" in support of her new album.

The 29-year-old pop star has already posted 20 North American dates on her official site, beginning in Uncasville, Connecticut on July 15 and ending in Irvine, California on August 19. She is set to be joined on the dates by Leona Lewis, who will complete her first UK tour shortly before Aguilera's US trek begins.

Tickets for Aguilera's US dates go on sale May 21, with all fans who buy before June 4 receiving a code to download the singer's new album, Bionic, on June 7 - a day before its official release.

Aguilera last toured in support of her 'Back To Basics' album in 2006 and 2007.