Ashlee Simpson's '80s Prom Night Birthday

With boyfriend Pete Wentz, the 23-year-old parties in pink with 200 pals

Published on October 15, 2007 07:00 PM

01 of 05

Ashlee Simpson and boyfriend Pete Wentz celebrate her 23rd birthday with,

like, a totally awesome party: an '80s prom night theme bash at her parents'

house in L.A. earlier this month.

02 of 05

Jessica Simpson gives a nod to Madonna – fingerless lace gloves! – and hairspray as she takes her prom picture.

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Big hair, big night: Friend CaCee Cobb and beau Donald Faison (Scrubs) show their love for the '80s.

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Pals Simpson and actress Emmy Rossum rest up between songs. Throughout the

night, music by the Cars, the Cure, Boy George and more got the 200 guests

on the dancefloor.

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Have a blast! Fall Out Boy rocker Wentz – who shared a dance with the

birthday girl to Bryan Adams's "Everything I Do" – says, "Now we can

say we are high school sweethearts!"