ALavigne051708_06_X17.jpgALavigne051708_09_X17.jpgAvril Lavigne ALavigne051708_01_X17.jpgAvril and her girls hit up Hollywood hotspot Villa Saturday night, where they partied practically until closing. Guess she wasn't invited to the Wentz-Simpson wedding!

Avril and her husband, Sum 41's Deryck Whibley have been married for almost two years now (they'll celebrate their second anniversary on July 15th), but we rarely see them out in LA together.

Is that the secret of their happy marriage? Or is it a sign there's something wrong?