lax airport Nicole Richie is back in LA after accompanying her new hubby Joel Madden on part of the European leg of his Good Charlotte tour, where she's thrilled with her new last name!

Yesterday, she tweeted:

    "This whole 'my last name is Madden' thing is really working for me here in Ireland! I'm down, I'm down!"


Madden is an Irish name (and actually Joel's mother's maiden name) so it makes sense that Nicole might get special attention for the moniker while in Ireland!

Nicole and Joel married December 11th after four years and two kids together. The lavish wedding took place at her father, Lionel Richie's Beverly Hills estate, where they tied the knot in front of friends, family and an elephant!