Kristin Cavallari took a walk in her LA neighborhood today with her dog Bardot, but without her engagement ring. News broke this weekend that Kristin and her fiancé, Jay Cutler, broke up just a week after hosting an engagement party for family and friends. The reality star hasn't made any official comment on the split, but Kristin thanked her Twitter fans for their support in a message today, and hasn't been spotted wearing her ring since the reports surfaced. She and Jay seemed to be going strong just two weeks ago as they vacationed in Miami, where they lounged poolside, and where Jay sat front row to cheer Kristin on as she walked in a swimwear runway show. Kristin is reportedly coping with the change of their wedding plans by spending time among friends. She stepped out on Saturday night with a group for an evening out on the town, during which she was overheard filling in her fellow partygoers on her breakup from the star QB.

Miranda Kerr stopped by a nail salon in LA today before meeting up with her two main men, Orlando Bloom and Flynn, at the Four Seasons Hotel for lunch. The model mom wore a floral-print midi dress and neutral pumps for her day out. Miranda and her son, Flynn, are back home after taking a weekend trip to Santa Barbara together to visit some friends. The trip came after a big milestone for the Bloom-Kerr family — Orlando and Miranda celebrated their first wedding anniversary last week! The young parents have spent much of their Summer doting on their infant, who just turned 6 months old a few weeks ago, and Orlando and Miranda frequently take him along to their workouts, shopping trips, and travels.

A bikini-clad Bar Refaeli and her boyfriend, David Fisher, were back on the water today yachting with friends off the coast of Porto Cervo, Italy. Bar slipped into another jewel-toned bikini to soak up the sun following a romantic walk along the shore with David. The seafaring couple have been inseparable since arriving on the Mediterranean coast, though she did sneak in a dinner with close friend Vale Micchetti last night. Meanwhile, around the globe Bar's former beau Leonardo DiCaprio is still making a go at it with Blake Lively. Leo and Blake were spotted leaving a Stevie Wonder concert at LA's Hollywood Bowl over the weekend. Bar's bronzed body is among the leaders in this year's PopSugar Bikini Bracket — don't forget to fill out your bracket for a chance to win $1,000 from J.Crew!

Jake Gyllenhaal and his sister, Maggie, were in Hawaii over the weekend to attend their father Stephen's wedding. They were on the island of Oahu for the nuptials yesterday. The groom wore a white linen top to tie the knot with his bride, Kathleen Man. Kathleen is a filmmaker and professor and has worked on the project Grassroots alongside Stephen. The location was a special one, as Hawaii is Kathleen's home state — she even went to the Punahou School, where President Obama went as a kid! It was three years ago that Stephen split from Jake and Maggie's mom, Naomi Foner. Maggie and Jake went with the islands theme by rocking leis for the ceremony. Jake even served as a groomsman and was spotted making the shaka hand sign for photographers.

Ryan Reynolds and Peter Sarsgaard kept their European Green Lantern trip going today at the Berlin premiere of the movie. The onscreen nemeses threw their arms around each other to pose for pictures and cracked each other up on the green carpet as they debuted the superhero film in Germany. Peter's promotional duties prevented him from joining his wife Maggie Gyllenhaal at her father, Stephen Gyllenhaal's, wedding this weekend in Oahu. Instead, Peter and Ryan are globetrotting, as their 3D film enjoys an international rollout, kicking things off with a stop in Spain last week. Green Lantern hit theaters in America on June 17, and while it took the top spot at the box office its first weekend, it didn't perform quite as well as some of this Summer's other big action features like Thor and current number one Captain America.

Brooklyn Decker didn't let the Georgia heat get to her today on the set of What to Expect When You're Expecting in Atlanta. The swimsuit model turned actress, who is in the running in this year's PopSugar bikini bracket, sported a pink robe in between takes and even wore a faux baby bump during one scene. Brooklyn is teaming up with Cameron Diaz and Jennifer Lopez on the romantic comedy. Cameron plays a fitness guru, Jennifer stars as a woman who decides to adopt, and Brooklyn portrays a young trophy wife in the adaptation of the classic book. Brooklyn is no stranger to acting alongside some of Hollywood's most famous females, having most recently appeared in last Summer's Just Go With It with Jennifer Aniston.