Star Tracks: Friday, July 27, 2012

Whee! Jessica Alba helps her 11-month-old cutie Haven keep steady during a family outing with big sis Honor, 4, to a New York City park on Thursday.

No Doubt's Gwen Stefani and Tony Kanal get their day started with a little rock and roll, performing Friday on ABC's Good Morning America in New York's Central Park.

After a successful turn hosting the Teen Choice Awards, a solo Demi Lovato focuses on her day ahead during an outing Thursday in Miami Beach.

After his cute brood celebrated their latest baby news, Matthew McConaughey fetes wife Camila on her latest role as INC International Concept's brand ambassador in New York on Thursday.

First lady Michelle Obama shows her fighting form during a visit with U.S. Olympians at an east London sports center on Friday. "Try to have some fun," she urged. "Try to breathe and take it in. But also win!"

Rihanna sets her sights on a day of RampR while lounging aboard a yacht in Eze-sur-Mer, France, on Thursday.

A coral-clad Jessica Biel dons a nameplate necklace in honor of her fiancé while running errands in West Hollywood on Thursday.

After offering a look into her country-chic home, mom-to-be Reese Witherspoon steps out to shop in Brentwood, Calif., on Thursday.

After going for a walk with Mom, 1-year-old Harper Beckham gets a lift from dad David on Thursday during a father-daughter outing in London.

What's he saying? Prince Harry keeps his sister-in-law, Catherine, the Duchess of Cambridge, in stitches Thursday as the pair, alongside Prince William (not pictured), observes the Olympic torch relay pass through London's Buckingham Palace.

Mom-to-be Sarah Michelle Gellar keeps covered up with a fedora and shades Thursday while heading out in Santa Monica, Calif.

Team U.S.A. gymnasts Jordyn Wieber and Gabrielle Douglas hit the gym for a training session at London's North Greenwich Arena on Thursday, one day before the start of the Olympic games.

With a wink and a smile, Halle Berry, who was rushed to the hospital last week with a head injury, reports to the set of her upcoming film, The Hive, on Thursday in L.A.

Rain, rain, go away! Sandra Bullock spends her 48th birthday dodging raindrops Thursday on the Dorchester, Mass., set of her new movie, The Heat.

Life is good! Twilight hunk Kellan Lutz looks ready to come sail away with girlfriend Sharni Vinson (not pictured) aboard a yacht Thursday in Saint-Tropez, France.