Alessandra Ambrosio wore her bikini bottoms while hanging out on the beach in Malibu with daughter Anja and fiancé Jamie Mazur yesterday. Earlier in the day Alessandra and Jamie took their pup shopping. The model just gave birth to baby Noah in May and shared the first pictures of her little guy last month. Noah wasn't spotted in the sand, but he did make an appearance with his family on Fourth of July. The festive fun continued yesterday when Alessandra snapped pictures of Anja playing near the water and then took a turn in front of the camera herself. Alessandra and Jamie kissed on the balcony of a beach house while a pal captured the sweet moment. Her amazing bikini body has landed her a spot on this year's Bikini Bracket, so make sure to vote for a chance to win $500 to Neiman Marcus!

Blake Lively and Ryan Reynolds embraced in a sexy show of PDA during a Fourth of July party with Blake's family in New York on Wednesday. Blake wore a patriotic polka-dot swimsuit for the fun while Ryan went shirtless during the festivities. Blake and Ryan took turns dunking each other in a water game, and the duo snapped pictures of the excitement on a phone.

It's an exciting week for Blake since Savages hits theaters today after plenty of promotion. Blake made the talk-show rounds and premiered the dramatic film in LA and NYC last month. Ryan didn't join her on the red carpet, but they were spotted grocery shopping together in New York before she kicked off press. If you're not sure about heading to the theater to see Blake's latest effort, make sure to check out BuzzSugar's many reasons to see Savages.

Kate Hudson is currently visiting Paris, but just a few weeks ago she slipped away to Greece for some beach time. Kate, dressed in a black Chloé bikini, joined Matthew Bellamy and son Ryder Robinson on a tropical getaway with her parents Kurt Russell and Goldie Hawn.

Kate's fit frame has been put in the running for this year's title of PopSugar bikini bracket champ! She's facing off against former winners Jennifer Aniston and Halle Berry, and she'll have to pull out all the stops to jump ahead of friends like Cameron Diaz, Reese Witherspoon, and Gwyneth Paltrow. Be sure to fill out your bikini bracket for a chance to win your favorite Summer sunglasses with $500 from Neiman Marcus.

Britney Spears shared a sweet picture of herself in a bikini with her sons, Sean Preston and Jayden James, in Hawaii yesterday. She added, "Getting ready for some pool time! Having a blast." Britney was later spotted heading to her hotel pool with a shirtless and very tan Jason Trawick and her boys. Britney and her fiancé traveled to the islands with Sean and Jayden on Monday, and they've been soaking up the sun ever since. The foursome celebrated the Fourth of July together yesterday and captured the holiday fun with a sweet snap of them all wearing leis. They were just a few of the many stars — from Zac Efron to Jessica Alba to Heidi Klum — marking Independence Day on the beach.

Did Justin Bieber and Selena Gomez break up? Last night it certainly didn't look like the lovebirds were on the rocks as Justin led the way for his girl after dinner at Pink Pepper Thai restaurant in LA. Justin and Selena held hands as they walked back to their car together. There have been rumors swirling for a few weeks that there is trouble in paradise for the hot young couple, and yesterday it was reported that they've been even more off and on recently. Selena was apparently nursing a broken heart at Ashley Tisdale's bikini birthday party on Monday, but by last night Justin and Selena appeared to have patched things up. Justin has been hard at work on his "As Long as You Love Me" music video, though he still seems to be making time for Selena. The two were also spotted out on an ice cream date over the weekend.

Selena is currently holding her own in the 2012 PopSugar Bikini Bracket — play now for a chance to win $500 to Neiman Marcus!