Star Tracks: Thursday, August 4, 2011

By People Staff
Updated August 04, 2011 05:00 PM

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PRESIDENTIAL SWEET

Credit: Fame

Jennifer Hudson wishes President Barack Obama a happy 50th birthday Wednesday at Chicago's Aragon Ballroom for a Democratic National Convention fundraiser with Mayor Rahm Emanuel.

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PUMPED UP

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Buffer than ever, Kellan Lutz gets pulses racing Wednesday, doffing his shirt for a beachside run in L.A.

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STAR ABOARD

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After a romantic New York cruise with Leo, Blake Lively gets back to work Wednesday, filming a sundrenched scene for Gossip Girl's fifth season in Santa Monica, Calif.

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HERE COMES THE SON

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Carry on! Pete Wentz hits a Beverly Hills shopping mall on Wednesday holding his most valuable possession – two-year-old son Bronx.

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JUST BLUE IT

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Newly single Kate Bosworth has a case of the blues – hair color, that is! – while hitting a Coldplay concert (sponsored by Samsung and ATampT) in L.A. with new beau, director Michael Polish, on Wednesday.

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JUICING IT

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Bethenny Frankel brings her own neon spotlight to celebrate the launch of her new SkinnyGirl Sangria cocktail at New York's Gramercy Hotel on Wednesday.

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JET SET

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Rachel Weisz makes a fast break into New York City's JFK airport with son Henry, 5, and new husband Daniel Craig.

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GOT THE MESSAGE?

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Justin Bieber lets his potty-mouthed tee do the talking Wednesday while shopping on Los Angeles' Melrose Avenue.

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CAP IT OFF

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After attending the premiere of The Change-Up, Sandra Bullock attends to her main man, 18-month-old Louis, in L.A. on Wednesday.

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STREET CHIC

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Emma Stone stops traffic in another peek-a-boo black dress Wednesday while arriving at the Late Show with David Letterman studios in New York.

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TICKLED 'PINK'

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Leaving her pampered pooch at home, Cowboys and Aliens star Olivia Wilde shows off her Pink Floyd love Wednesday in Los Angeles.

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SEAL-ED WITH A KISS

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Sheryl Crow makes friends with one cuddly critter, sea lion Clyde, during a visit Wednesday to SeaWorld in San Diego, Calif.

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AWWW LA CART

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Usher wheels a double bundle of cuteness – sons Naviyd, 2, and Usher V, 3 – during a sunny stroll in New York City on Wednesday.

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STAR & STRIPES

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Amanda Seyfried keeps it casual in flip-flops Wednesday in between shooting scenes for her latest movie, The Wedding, in Greenwich, Conn.

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AB-TASTIC ARRIVAL

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Looks like those workouts are paying off! Ashley Tisdale shows off her fit form as she heads into a West Hollywood gym Wednesday.

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