OK! Exclusive: Ashlee Simpson Cancels Summer Tour

(Mark Allan/WireImage)

A bit of bittersweet news from Ashlee Simpson-Wentz — the new wife and expecting mother has postponed her summer tour that would take her across the U.S.

"After careful consideration, Ashlee Simpson has decided to postpone her summer tour," a spokesperson for the singer tells OK!. "She is committed to giving her fans the best show possible, and will be back better than ever and ready to rock in the future."

Until then, looks like Ash will enjoy her newlywed status with hubby Pete Wentz.