Star Tracks: Friday, June 25, 2010

After rooting for baseball player beau Matt Kemp in Boston, Rihanna holds tight to him at a Westwood, Calif., ATampT store Thursday.

Jessica Alba looks très belle in her anything-but-basic black Lanvin dress – and gorgeous updo – Thursday at the Parisian premiere of The Killer Inside Me.

Eclipse stars Robert Pattinson, Kristen Stewart and Taylor Lautner look absolutely fang-tastic Thursday at the Los Angeles premiere of the newest Twilight film, which arrives in theaters June 30.

Nutz for Lutz? Who isn't? Nearby, Kellan Lutz playfully faces hundreds of adoring fans on the red carpet at the Eclipse premiere.

After the premiere, Kristen Stewart – who traded her white hot frock for a tank top and jeans – squeezes in a cuddle with rumored boyfriend Robert Pattinson at the Eclipse afterparty.

Justin Bieber keeps his fans close while performing during his first major headlining tour at Trenton, N.J.'s, Sun National Bank Center Thursday.

A glam Kelly Rowland, who most recently hosted Bravo's Fashion Show, scores a front row seat to Jean-Paul Gaultier's spring-summer 2011 menswear presentation in Paris Thursday.

Cate Blanchett is in work mode – hard hat and all! – as part of the Sydney Theatre Company's "Greening the Wharf" project, which installed solar panels on the theater's rooftop in Sydney's Walsh Bay. The actress and her husband are the company's artistic directors.

A casually chic Katy Perry gets animated with a fan while signing autographs outside of London's BBC 1 Radio building Thursday.

Meanwhile, Perry's fiancé Russell Brand finds himself between a "Hug Me" balloon and Get Him to the Greek costar Jonah Hill Thursday during a photocall in Amsterdam for their new comedy, in theaters now. Hmm ... Is he sending her a love message with that heart-shaped balloon?

Jennifer Garner continues with her philanthropic work on Thursday, meeting with children from the Boys amp Girls Club of Annapolis to promote early childhood education at a press conference in Washington, D.C.

Kim Kardashian gets serious about her fitness at a West Hollywood gym Thursday. The brunette beauty is reportedly off the market again after hooking up with NFL player Miles Austin.

Look who's back! Conan O'Brien is greeted by fans after dining at a New York City restaurant Thursday. The late-night host returns to TV with a new show in November.

Is she buying something to wear for Brody? Avril Lavigne brightens up her neutral ensemble with a hot pink Betsey Johnson bag on Wednesday after a shopping trip in L.A.

Pink gets down on Wednesday while performing at Liberty Stadium in Swansea, Wales. The singer is in the midst of her Funhouse Summer Carnival Tour, which stops in London, Belgium and France next week.