We know Joel Madden is a rocker, but this multi-colored hairdo may be a bit much!

Nicole Richie's hubby arrived at La Descarga in Hollywood to celebrate Jessica Alba's birthday sporting a dye job fit for Rainbow Brite. Yikes!

Wonder if Joel's wifey gave him a thumbs up on this look? We have a feeling their two kids, Harlow and Sparrow, are diggin' dad's 'do.