Washington (ANI): American pop rock singer songwriter Ashlee Simpson has postponed her summer tour after confirming her pregnancy. "After careful consideration, Ashlee Simpson has decided to postpone her summer tour," People mag quoted the singer's publicist as saying in a statement on May 31 Saturday. "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," the publicist added. Simpson was in Vegas with her parents and husband for the Palms Place grand opening party where Wentz was spinning, and as he played "Power of Love" he dedicated a song to his father in law. "This is dedicated to my father in law Joe Simpson. I definitely have the power of love for you," Wentz said. He later dedicated a song to his "baby momma," who was sitting in the VIP section with her mom drinking water.