A just-married and pregnant Ashlee Simpson [ tickets ] will step out for a short tour next month to support her new album, "Bittersweet World."

The 23-year-old pop-rock singer is scheduled play a dozen dates in the eastern US beginning June 9 in Chicago. She also has a June 14 booking at the Atlantis Resort in Nassau, Bahamas. Her US itinerary is listed below.

Simpson has been a busy lady over the past few months: In addition to making the promotional rounds to push "Bittersweet World," which dropped April 22, she married Fall Out Boy bassist Pete Wentz May 17 and the couple recently announced they are expecting a child. People.com recently reported that Simpson will take Wentz's last name, but plans to use the professional name Ashlee Simpson-Wentz.

For now, the focus turns to taking the new album to live audiences, and Simpson can't wait to hit the road.

"That's my favorite part of the job," she said in her bio. "I love playing live and seeing up close and personal how your music affects other people."

Simpson wrote or co-wrote every song on "Bittersweet World," which peaked at No. 4 on The Billboard 200. The lead single, "Little Miss Obsessive" featuring the Plain White T's Tom Higgenson, recently made its way onto Billboard's Pop 100 chart.

Simpson said she is loving her life right now and wanted to bring that spirit to the new album.

"I wanted to make music people could shake their booties to and use beats for the first time," she explained. "I wanted to sing fun songs. Basically, I wanted to make a party record."

A couple of song samples from the album are streaming at her MySpace page.

"Bittersweet World" is Simpson's third release, following 2004's "Autobiography" and 2005's "I Am Me," both of which topped The Billboard 200 and led to sold-out tours, according to the performer's bio.