Gwen Stefani is 43 today! Gwen isn't just famous for being a talented singer and fashion designer; she's also well known for her washboard abs and has never been shy about showing them off. The mom of two keeps fit while running after sons Kingston and Zuma, as well as on stage when performing with No Doubt. This year has been a big one for the band, as the group released its first studio album in over a decade. When she's not working, we can usually find Gwen at the beach with her family, flaunting her legendary figure in bikinis and cropped tees.
In celebration of Gwen's big day, we've rounded up 20 of her hottest bikini moments. Click through to see them all now!