aguilerasmil7.jpg Christina Aguilera has announced that she's postponing her summer tour and pushing the shows back to an unspecified time in 2011.

The tour was supposed to kick off on July 15 at the Mohegan Sun Arena in Uncasville, Connecticut, but due to a her involvement in Burlesque and her promotional duties for hew new album Bionic, Aguilera's rep said, "The singer felt she needed more time to rehearse the show and with less than a month between the album release and tour dates this wasn't possible."

Hmm, isn't going on tour part of promoting your album? Or is she embarrassed because the songs that leaked last week sound like some of Britney's old demos?