Ashlee Simpson and fiance Evan Ross spent the whole Wednesday engaging in some major retail therapy as they comb through the shops in style in L.A. Pete Wentz's ex wife seemed to have taken a time off from planning her wedding and possibly from the "wedding war" with big sister Jessica Simpson.

According to Perezhilton.com, the soon-to-be married pair were riding around on a limousine and “shopping wherever they pleased.”

Ashlee Simpson and Evan Ross, son of Supremes singing diva Diana Ross, met in July last year and announced their engagement earlier this year following a whirlwind romance. No wedding date has been announced.

If they marry, it's going to be the second time for Ashlee Simpson who was previously married to Pete Wentz, bassist of the Fall Out Boy, and divorced in 2011. They have a son together named Bronx.

Meanwhile, Star reported that Ashlee Simpson is pressured to please her fiance Evan Ross that she's even considering to go under the knife to get bigger breasts.

The report said that the singer is planning to undergo breast augmentation in order to keep Evan Ross happy. "Evan likes skinny women with large breasts. She wants to get this done as soon as possible,” the report said. “Jessica has curves in all the right places, while Ashlee is stick thin. She's determined to change that."

But Evan Ross is clearly so smitten with Ashlee Simpson that he told omg! Insider that he's so in love with her girlfriend at that time, and can see himself marrying her “We've got amazing things going on. 'And we inspire each other. She's the one.”

Ashlee Simpson has also been snapped hitting the gym on Los Angeles on Tuesday, which prompted MailOnline to assume that it's going to be a short engagement for the pair.

Her big sister, Jessica Simpson, is also trying to keep down her weight in time for her own wedding. The older Simpson has been recently seen with her amaxing post baby body.

A report by OK! claim that the Simpson sisters are now feuding over their weddings stating that Jessica Simpson does not like sharing her caterer and florist with Ashlee Simpson.