It's Kingston Rossdale's fourth birthday today! When he's not taking a cue from mom Gwen Stefani's funky fashion, he loves to dress up. From Santa outfits to elephant suits, the cute celebrity kid doesn't need a reason to don a costume. Gwen also just denied that she's pregnant again, so for now it's just Kingston and his little brother Zuma. Take a look at some of our favorite getups from 4-year-old Kingston!