Ben Stiller, Christine Taylor, Jonah Hill and more celebrate the Hollywood premiere of The Watch; Mindy Kaling, Britney Spears and other stars of FOX's fall lineup take the hot seat at the TCA's Summer Press Tour; FOX throws their All-Star Party at Soho House for stars like Lea Michele, Zooey Deschanel and Seth MacFarlane; Katy Perry and other locals with great taste in music go see Haim open for The xx in Hollywood—here's how L.A. pretty much covered all the entertainment industry bases Monday with movies, TV and music in this installment of Last Night's Parties.

Ben Stiller, Jonah Hill, Vince Vaughn [via]

Soho House Katy Perry Tropicana American Idol Vince Vaughn Britney Spears Jonah Hill Ben Stiller Christine Taylor Lance Reddick Zooey Deschanel Cloris Leachman James Carpinello Cat Deeley Joshua Jackson Martha Plimpton LA Reid Kiefer Sutherland glee lea michele Chris Messina Zach Gilford Matthew Morrison Grauman's Chinese Theatre Will Forte Simon Cowell Gordon Ramsey beverly hilton hotel Lucy Punch Mindy Kaling Demi Lovato the XX Christopher Scott Harry Shum Jr. Seth Macfarlane Fox Tom Rothman Amber Riley Soho House West Hollywood Darren Criss Chord Overstreet Akiva Schaffer Chris Colfer Shannon Woodward Nicholas Braun Jared Stern Kevin McHale Dakota Johnson Hannah Simone Richard Ayoade Anna Torv Nigel Lythgoe Jim Gianopulos Josh Berman Doug Jones Rosemarie DeWitt Anna Camp Television Critics Association Television Critics Association Summer Press Tour fringe Nat Faxon Erin Moriarty Mimi Gianopulos Noureen DeWulf THE X FACTOR William Forsythe Ed Weeks Jordana Spiro Valerie Azlynn Jen Lilley Haim Danielle Haim Este Haim Alanna Haim Shawn Levy The Fonda Theatre Jamie xx Brett Butler Jamie Smith Haim at The Fonda The xx at the Fonda Romy Madley Croft Oliver Sim FOX All-Star Party Mary Murphy 2012 Summer TCA Tour Day 3 With FOX 2012 Summer TCA Tour with FOX 2012 Summer TCA Press Tour J.H. Wyman Jaime Lee Kirchner Jesse Lee Soffer Rob Wright Katherine Pope Matt Warburton Stephen Tobolowsky Ike Barinholtz Stacey Tookey Spencer Liff Zeljko Ivanek