Star Tracks: Monday, July 30, 2012

Short-shorts-wearing Michelle Williams offers a shy greeting Sunday as boyfriend Jason Segel (not pictured) drops her off for a spa appointment in West Hollywood.

What a reunion! Cox's former Friends costars Matt LeBlanc and Lisa Kudrow flash their megawatt smiles Sunday during Showtime's Summer TCA Party in Beverly Hills, where they promoted their respective TV shows, Episodes and Web Therapy.

She may be on vacation but Rihanna – in a printed blue and white Brood dress – looks ready to hit the runway Sunday as she does some shopping in Monaco during her holiday in the French Riviera.

Comfort is king with Channing Tatum, who can make even a pair of cargo sweat-shorts look amazing after a Sunday workout in Manhattan.

Jessica Biel's massive, sparkling engagement ring almost steals the show from Colin Farrell as the Total Recall costars promote the sci-fi remake in Los Angeles on Saturday.

Courteney Cox and daughter Coco Arquette, 8, find a reason to smile Sunday despite being caught in a sudden downpour in New York's Soho neighborhood.

With the Modern Family salary feud coming to an end, Jesse Tyler Ferguson has plenty to sing about with Rebecca Romijn during the Hollywood Bowl's revival of the hit musical The Producers on Friday.

Talk about a balancing act! New mom Molly Sims keeps her hands full with her bundle of joy Brooks, 1 month, after a trip to the doctor's office in Santa Monica, Calif., on Friday.

A very pregnant Drew Barrymore and her husband Will Kopelman (not pictured) stepped out for a pre-baby breakfast Saturday morning in L.A.

Gwen Stefani's son Kingston, 6, shows off a bold hue on a carriage ride with his mom after visiting New York City's Central Park Friday.

After celebrating her Macy's campaign, Camila Alves gets back into mommy mode on Friday, leading the way for daughter Vida, 2, and son Levi, 4, in New York.

Catherine, Duchess of Cambridge plays ambassador for England at a reception for foreign dignitaries attending the Olympics Opening Ceremony on Friday, mingling with President Elbegdorj Tsakhia of Mongolia (left) and a guest at London's Buckingham Palace.

Following a quick trip to New York City, Miley Cyrus fuels up Friday for her return to Philadelphia, where fiancé Liam Hemsworth continues to shoot his new film Paranoid.

She shoots, but does she score? After offering a pep talk to Team U.S.A., first lady Michelle Obama tests her soccer skills alongside a dapper David Beckham during a "Let's Move" event at the U.S. ambassador's residence in London on Friday.

They may play adversaries on their upcoming ABC drama Nashville, but Connie Britton and Hayden Panettiere happily share the spotlight during the Disney/ABC Television Critics Association press tour Friday in Beverly Hills.

Josh Hutcherson continues to keep it moving on Friday after visiting a Los Angeles gym for a workout.

After a family outing the day before, Jessica Alba grabs an iced drink while venturing around New York City on Friday.