Rachel Bilson wasn’t the only Hollywood type to get all dolled up yesterday for a friend’s wedding.

Gwen Stefani and Gavin Rossdale also attended a pal’s nuptial ceremony in Los Angeles yesterday.

Also in attendance were Christina Aguilera and her husband Jordan Bratman.

And speaking of weddings, Gwen and Gavin recently celebrated their sixth wedding anniversary.

Doesn’t it seem like only yesterday they were writing break-up songs on their sophomore albums?

[Flynet]