Celebrity Star Tracks: Thursday, August 18, 2011 By People Staff Updated on January 24, 2022 01:04 PM Share Tweet Pin Email Trending Videos 01 of 16 RETURN ENGAGEMENT Chris Jackson/Getty Following a Grecian honeymoon, newlywed Tara Reid announces her presence as a celebrity houseguest at the Big Brother house Thursday in Borehamwood, England. 02 of 16 RIDE ON WENN New mom Kate Hudson works on her post-baby bod with a bike ride around London Thursday, where the actress touched down with baby Bingham earlier in the week. 03 of 16 SEALED WITH A KISS Jason Merritt/Getty Days before their wedding, Kim Kardashian and her fiancé Kris Humphries put their love on display Wednesday night at the launch of the Kardashian Kollection for Sears in Hollywood. 04 of 16 KEY GRIP Fame The Help's leading lady Emma Stone takes a much-deserved breather with a day out in Hollywood on Wednesday. 05 of 16 MUG SHOT Bruja/Pacific Coast News Officer Jake, where's the donut? A newly shorn Gyllenhaal gets his java fix Wednesday on the L.A. set of his cop drama, End of Watch. 06 of 16 WORKING IT Johns PKI/Splash News Online Solange Knowles makes a stylish statement with son Daniel Julez, 6, Wednesday while toasting fashion icon Anna Dello Russo's collaboration with Macy's INC collection in New York. 07 of 16 TO HAVE & TO HOLD INF After wrapping Harry Potter and the Deathly Hallows, Daniel Radcliffe settles back into a low-key life, taking a casual stroll Tuesday with his reported girlfriend in New York. 08 of 16 BAG IN ACTION Flynet Wearing one of her favorite bags, Olivia Wilde lives life on the fringe Wednesday in Hollywood. 09 of 16 FOUR OF A KIND Wylde/Splash News Online It's a family affair! Naomi Watts and Liev Schreiber enjoy the summer sun with sons Sasha, 4, and Kai, 2, and their Yorkie Bob Wednesday in New York's SoHo neighborhood. 10 of 16 HANDS UP E. Hall/INF After celebrating his birthday in Las Vegas, Joe Jonas returns to New York Wednesday, where the singer greeted fans before hopping into an awaiting car outside his hotel. 11 of 16 GOOD GENES Lucas/Bauer-Griffin They get it from their mama! Pippa and Carole Middleton prove that chic style runs in the family while shopping on London's King's Road on Wednesday. 12 of 16 HOT WHEELS Max Shelton/G Environmentalist Leonardo DiCaprio drives home his point, stepping behind the wheel of a 2012 Fisker Karma, a plug-in hybrid electric car, Wednesday in L.A. 13 of 16 CROWD PLEASER Doug Meszler/Splash News Online Usher gives his fans something to talk about – and snap photos of – while heading out in New York Wednesday. 14 of 16 TAKE FIVE Fame After wrapping a day's work on the set of World War Z, Brad Pitt waves to his admirers before departing from Glasgow's George Square in Scotland Wednesday. 15 of 16 MINT CONDITION Zak Hussein/INF Kelly Rowland arrives in style – hello, Versace! – at London's O2 Arena, where the newly minted X Factor judge promoted the U.K. talent show Wednesday. 16 of 16 COFFEE RUN Biagi/AKM Whitney Port grabs some coffee to go Wednesday at The Coffee Bean amp Tea Leaf in Hollywood.