We already saw the pics with pal Kate Hudson (you know, where you can practically see the starlet's nipple), and now more photos have emerged from Nicole Richie's disco-themed birthday party, which was held at The Standard in Los Angeles on Friday night.

Nic's hubby Joel Madden was there, along with her dad Lionel, sister-in-law Cameron Diaz, Jessica Alba, Ellen Pompeo, Samantha Ronson and Rachel Zoe. Guests skated around a roller rink and boogied to tunes like Whitney Houston's "I Wanna Dance With Somebody (Who Loves Me)" and Diana Ross' "I'm Coming Out," and the couldn't seem to stop taking selfies!

"Loved celebrating this gorgeous babe @nicolerichie #hbd #disco #lanights," Jessica wrote, while Joel posted a photo earlier in the week online and wrote, "Best Mom, Best Friend, Best Wife. Happy Birthday Nicole, You keep us all laughing." Nicole then posted a montage of pics below -- looks like this group had a BLAST!

35 ⚡️💋⚡️ #NightFever

A video posted by @nicolerichie on