Here's your invite to a celebrity bridal shower. Flower headband essential.

With her big day approaching, Ashlee celebrates with cocktails, cake, flowers and friends.

It’s not her first time being a bride, so it’s safe to say that Ashlee Simpson, 29, knew exactly what she wanted when she celebrated with a pool-side bridal shower. And of course, big sister Jessica Simpson offered to host, opening her L.A home to 20 of Ashlee’s bridesmaids, family and friends for the party.

Ashlee and her guests wore beautiful flower crowns, sipped on cocktails and took a bunch of selfies in the process. There was even a surprise flashback cake in Ashlee’s honour.

“Someone was on hand to help all the guests make flower wreaths. The bridesmaids picked a throwback photo to decorate the cake” People reports.

Jessica also took the opportunity to slip into her swimmers, captioning a shot with “Oh yea girl…We are proud to be in our bathing suits!! @baylormcg #hardworkpaysoff #workoutpartnersforlife”

Ashlee’s fiancé, Evan Ross, the son of legendary singer Diana Ross, didn’t miss out on the action either. He partied a long with a group of his friends and his soon to be brother-in-law, Eric Johnson.

Ashlee was previously married to Fall Out Boy lead singer, Pete Wentz, who she separated from after three years of marriage. They have one child together, their son Bronx, 5.

CLICK THROUGH the gallery for all the pictures of Ashlee’s bridal shower…

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