Ashlee Simpson's '80s Prom Night Birthday

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

01 of 05

ANGEL & KING

ANGEL & KING
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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

BIG TEASE

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

03 of 05

DATE NIGHT

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

04 of 05

PRETTY IN PINK

PRETTY IN PINK
Michael Caulfield/WireImage

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.

05 of 05

MOST LIKELY TO ...

MOST LIKELY TO ...
Michael Caulfield/WireImage

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!"

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