Happy 55th birthday to the one and only Gwen Stefani! It's hard to believe that the queen of cool has hit the double nickel mark, but we know she'll just keep getting better with age. Wishing you a day filled with fun, laughter, and plenty of cake. Here's to another year of rockin' it like it's nobody's business! Cheers to you, Gwen. 🎉🎂