Scott Caan, Sugar Ray Leonard and Joe Pesci hit the green at 10th Annual James Caan Golf Classic to benefit the Impact Treatment Center; Diane Kruger, Rachel Zoe, Emma Roberts, Zoe Saldana and many more of Hollywood's most stylish attend a dinner hosted by MAC Cosmetics and Vogue celebrating Prabal Gurung at Chateau Marmont; Annette Bening, Jackson Browne, Rita Wilson and others honor Billy Crystal the annual Backstage at the Geffen Gala; Ellen DeGeneres and Samuel L. Jackson join Steve Harvey at his Hollywood Walk of Fame star presentation ceremony—from golf courses to exclusive dinner parties, get the rundown on Monday's top events in this installment of Last Night's Parties.

Vogue Emma Roberts Diane Kruger Cody Horn Rachel Zoe Balthazar Getty Ginnifer Goodwin Dita Von Teese Chateau Marmont Joshua Jackson Ellen DeGeneres Rita Wilson Liz Goldwyn John Demsey Aubrey Plaza Zoe Saldana Annette Bening carol kane Samuel L. Jackson MAC Cosmetics Amber Valletta Lisa Love Zachary Quinto Jaime King Prabal Gurung China Chow Keegan Singh Claiborne Swanson Donovan Leitch Topher Grace Rodger Berman Steve Harvey Scott Caan George Kotsiopoulos Michelle Alves Jennifer Morrison Lily Rabe Abigail Spencer Rosetta Getty Shiva Rose Billy Crystal Chord Overstreet Hailee Steinfeld Bruce Vilanch Cedric The Entertainer Alice Eve Jena Malone Gelila Puck Alan Horn Josh Gad Jim Gianopulos David Cameron Morena Baccarin Hollywood Walk of Fame Joe Mantegna Sugar Ray Leonard Crystal Lourd Kendall Conrad Petra Flannery Jodi Lyn O'Keefe Keegan Allen Evan Peters Debbie Allen Wendy Raquel Robinson Liberty Ross Jack McGee Josh Dallas Geffen Playhouse Ken Novice Roma Downey Robby Krieger Ethan Peck Jackson Browne Richard Karn Phil McGraw Marjorie Bridges Steve Harvey Honored With Star On The Hollywood Walk Of Fame Diana Cohen Bruce Ramer Mona Golabek Gil Cates Jr. The Annual Backstage At The Geffen Gala Honoring Billy Crystal Backstage At The Geffen Gala Backstage At The Geffen Gala Honoring Billy Crystal Ginny Blackmore Liseanne Frankfurt MAC Cosmetics And Vogue Celebrate Prabal Gurung With A Dinner Hosted By John Demsey And Lisa Love Prabal Gurung dinner at Chateau Marmont MAC Cosmetics And Vogue Celebrate Prabal Gurung 10th Annual James Caan Golf Classic To Benefit Impact Treatment Center 10th Annual James Caan Golf Classic Impact Treatment Center El Caballero Country Club Joe Pesci Ronnie Caan Peter Waldstein AJ Caan