The release of Christina Aguilera’s long-awaited fourth album has been delayed a month, RCA Records said Wednesday.

Bionic – featuring production by The Neptunes, M.I.A., and Goldfrapp — was originally scheduled for release this March. The set will now drop in April.

Bionic is the first studio album for Aguilera since 2006′s Back To Basics. ‘”Glam,” the album’s lead single, is expected to debut next month.