Ashlee Simpson's '80s Prom Night Birthday

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.

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

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

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.

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!"