1 of 17
2 of 17
3 of 17
Someone's ready to work! Decked out in a Red Sox cap, Matt Damon heads to the gym in West Hollywood on Monday.
4 of 17
5 of 17
'PEACE' OF WORK
Katy Perry lets her hands do the talking in Tokyo, where she promoted her new album, Prism, on Tuesday.
6 of 17
Pierce Brosnan gives costar Salma Hayek his kiss of approval Monday on the Malibu, Calif., set of their new romantic comedy, How to Make Love Like an Englishman.
7 of 17
Reunited and it feels so good! Twilight alumni Peter Facinelli, Nikki Reed and Jackson Rathbone leave their fangs at home Monday to promote their franchise's fifth anniversary and the launch of the Twilight Forever: The Complete Saga box set at N.Y.C.'s Planet Hollywood Times Square.
8 of 17
MAN IN BLACK
Rob Lowe makes a dapper dinner companion! After premiering his new TV movie, Killing Kennedy, the actor sports a smile while leaving Beverly Hills restaurant Hakkasan on Monday.
9 of 17
TV Twins Tia Mowry-Hardrict and Tamera Mowry-Housley show some sisterly love during TV Guide magazine's Hot List party Monday night at Hollywood's Emerson Theatre.
10 of 17
TWICE THE SMILES
Idris Elba unintentionally mirrors Nelson Mandela during a press conference in Johannesburg, South Africa, for his upcoming film Mandela: Long Walk to Freedom on Monday.
11 of 17
Allison Williams strikes a fierce pose at the New York Public Library's Young Lions benefit Monday night in Manhattan.
12 of 17
Her friend may have a long face, but Kate Upton beams in colorful Derby-inspired gear while posing with Melbourne Cup contender Voleuse de Coeurs in Australia on Monday.
13 of 17
Jason Segel looks a little worse for wear while filming scenes for the upcoming film Basic Math in Los Angeles on Monday.
14 of 17
KEEP IT COORDINATED
Kourtney Kardashian and boyfriend Scott Disick pair up in plaid for a walk around N.Y.C. on Monday.
15 of 17
Jessica Alba and Benjamin McKenzie get hands-on while filming Monday on the Malibu, Calif., set of their new rom-com, How to Make Love Like an Englishman.
16 of 17
17 of 17
Star Tracks: Karlie Takes Tokyo, Plus Kate, Andrew & More
Kathy Griffin Leads Tributes to Stand Up Star Kevin Meaney, Dead at 60
Shannen Doherty Shares Moving Post-Chemotherapy Snap: 'Hope Is Possible'
Richard Simmons to Close His Iconic Exercise Studio in Los Angeles