gwen stefani bikini pictures

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!

Gwen Stefani slipped into a sexy two-piece and hit the beach with her family in Miami on Sunday. Gavin, Zuma, and Kingston Rossdale joined Gwen for a mid-Summer getaway. The family of four played in the sand, swam in the surf, and relaxed at the pool. Gwen modeled three different bikinis during the day, favoring zebra and leopard prints as well as a sporty black two-piece. Gwen's abs were on display during their beach time, and Gavin flashed his own impressive six-pack — don't forget to vote in our shirtless bracket!

Gwen appears to be enjoying a well-deserved break from work after sweeping through NYC last week to promote No Doubt's new album, Push and Shove. Gwen and the band performed their first single, "Settle Down," in Central Park and dropped by Late Night With Jimmy Fallon for an in-studio appearance. The group's got their sights set on Las Vegas, where they're scheduled to join musical acts like Rihanna, Usher, Taylor Swift, Pink, and more at this year's sold-out IHeartRadio music festival Sept. 21-22.

Gwen Stefani wore a bikini top yesterday to hit the beach in Mexico with her family. Her husband Gavin Rossdale was shirtless for the sandy adventure, and the duo had the help of a nanny keeping an eye on their young sons Kingston Rossdale and Zuma Rossdale. Gwen jetted South of the Border to meet up with Gavin, who's been on tour with Bush. Their show schedule had Gavin all over the globe in recent weeks. After a quick stint in LA shooting a small role for Sofia Coppola's The Bling Ring, he went to London for a few days. Gavin's happy to have the break with his loved ones. On Sunday, he took to Twitter to write, "Mexico rules — finally decompressing —  what an odyssey just getting here." The Stefani-Rossdales may be able to spend a week in Cabo. His next concert isn't until a week from today in Moline, IL.

Gwen Stefani was in a bikini yesterday for an afternoon out in Malibu with her husband Gavin Rossdale and their sons Kingston and Zuma. She looked super fit in her black top and long skirt combo, which showed off her amazing abs. Gavin, meanwhile, was shirtless to wade into the Pacific with Zuma and Kingston. It was the end of a fun week for the foursome, which kicked off on the previous Saturday when Gavin's band Bush performed at the Sunset Strip music festival. Gwen's group No Doubt has been able to enjoy a brief hiatus from finishing up their new music, since Tony Kanal is off on a vacation celebrating his birthday. Gwen and Gavin also made sure to pack the last few days with good times in honor of Zuma turning 3. His big day was on Aug. 20, and he was able to wear costumes, get a manicure, and bond with his brother to mark the milestone.

Gwen Stefani kept the bikini fun coming today as she relaxed on a yacht in Cannes. The singer has been soaking up the sun in a rotating uniform of two-piece suits for the last several days, showing off her sculpted abs and arms while she hangs out with her boys, Kingston, Gavin, and Zuma. She lounged on deck this morning while Kingston tried his hand at jet-skiing with a friend. The Stefani-Rossdales took part in the film festival's many events since touching down in Nice more than a week ago. Gwen worked some red carpets at premieres for Brad Pitt's The Tree of Life and Sean Penn's This Must Be the Place in show-stopping gowns, and she linked up with Gavin for a fancy evening out at the amfAR Cinema Against AIDS gala. The family headed to France for the glamorous celebrations following a trip to Gavin's hometown of London, where they enjoyed a more low-key schedule of park visits, tennis, and jogging.

Gwen Stefani relaxed on the deck of a yacht off the coast of Cannes on Saturday. She wore a white bikini to chat on the phone and snap pictures of the view during her latest sun-soaked lounge session. Gwen later headed to dry land with her boys Kingston and Zuma to stroll the streets of St. Tropez. They brought along a few friends for the day trip and stopped to enjoy gelato before returning to their luxurious vessel. Gwen and her family were overseas for the Cannes Film Festival, which she attended as a L'Oréal ambassador. She and husband Gavin Rossdale hit the red carpet together for The Tree of Life screening with Brad Pitt and Angelina Jolie and later showed their charitable sides at amfAR's annual star-studded Cinema Against AIDS gala. Gwen looked glamorous solo, though, for an appearance at Sean Penn's This Must Be the Place screening on Friday.

Gwen Stefani kept a watchful eye on Zuma as he splashed around in the pool on a luxury yacht off the coast of Antibes today. Gwen was back in her bikini after stepping out on the deck with a shirtless Gavin Rossdale yesterday. Kingston got in on the fun riding jet skis with his dad and returned to the water for a spin on a blow-up raft with Zuma this afternoon. Gwen and the whole family are in France for the Cannes Film Festival, where she's a L'Oreal ambassador, though so far they've been enjoying their stay away from all the glamorous red carpets. There have been lots of great pictures from Cannes since the festival got underway last week, so be sure to check out all the premieres, parties, and photocalls!

Gwen Stefani made her Cannes Film Festival duties as a L'Oreal ambassador into a fun family affair, and she was spotted out on one of the many glamorous boats off the coast of France today. She sported a bikini and waved off the top deck with Zuma while Gavin Rossdale took their older son, Kingston, out for a spin on a jet ski. The little guy held onto dad from behind as they sped off in the water near Antibes, and later hot Gavin stripped off his shirt to give us a peek at those abs. The Stefani-Rossdales arrived in Cannes on Friday and have since been hanging out on the yacht, owned by Russian businessman Roman Abramovich, and checking out the local sights. Don't miss all the amazing Cannes Film Festival pictures and check back to see the action from the red carpets, premieres, and parties around the French city!

2010 was a big year for Gwen Stefani, Gavin Rossdale, and their adorable boys Kingston and Zuma. The rocker couple kicked things off with a fun vacation to St. Barts, then got back to work with Bush and No Doubt. Gwen also focused on fashion, having her family's support as she showed two L.A.M.B. collections in NYC. Despite their demanding schedules, the parents made plenty of time to play at the park and even spend a day at Disneyland with their boys. Check out the gallery for a look back at the past twelve months for the Stefani-Rossdales, and don't miss all the Best of 2010 coverage, polls, slideshows and more on the PopSugar Network!