Photos: Warner Music's Grammy Party, With Bruno Mars, Neil Young, Skrillex, Lyor Cohen, Julie Greenwald, More
Photos: Warner Music's Grammy Party, With Bruno Mars, Neil Young, Skrillex, Lyor Cohen, Julie Greenwald, More

bruno Singer Bruno Mars performs for guests attending the Warner Music Group Grammy Celebration hosted by InStyle at the Chateau Marmont in West Hollywood, CA. (Photo: Vince Bucci/PictureGroup)

Warner Music threw an exclusive party after the Grammys at the legendary Chateau Marmont in Hollywood that had a staggering guest list. Along with Warner execs Len Blavatnik, Lyor Cohen, Julie Greenwald, Craig Kallman and others, the 300-or-so invitees included, according to a list slipped to A-Trak, Blake Shelton, Bruno Mars, Chelsea Handler, Coldplay, Common, Dwight Yoakam, Elvis Costello, Diana Krall, Estelle, Fergie, Flo Rida, Gabrielle Union, Jared Leto, Jill Scott, John Legend, Kara Dioguardo, Kelly Clarkson, Kelly Rowland, Lana Del Rey, new Atlantic artist Lauriana Maye, Lykke Li, Malin Akerman, Mastadon, Matthew Morrison, Metallica, Minnie Driver, Miranda Lambert, Muse, My Chemical Romance, Neil Young, Nia Long, Nicole Richie + Joel Madden, Omar Epps + Mike Epps, Paul McCartney and Nancy Shevell, Rashida Jones, Reba McIntyre, Sanaa Lathan, Santigold, Serena Williams, Skrillex, Vanessa Williams, Victor Cruz, Wynter Gordon and Ellie Goulding . Whew! Apparently all or nearly all of them showed up, as well.

skrillex (L-R) Sunny Moore AKA Skrillex poses with Atlantic Records Group Chairman and COO Julie Greenwald, singer Santigold and Lyor Cohen, Chairman and CEO Warner Music Group at the Warner Music Group. (Photo by Frank Micelotta/PictureGroup)

Bruno Mars - fresh from his rousing James Brown-inspired set early during the Grammys -- played a 40-minute covers set. Highlights included Jay-Z and Kanye's "N---as in Paris," the Police's "Roxanne," Sly's "Higher," Bell Biv Devoe's "Poison," MC Hammer's "Can't Touch This," Rick James' "Super Freak" and a few others - until police told them to shut it down due to noise levels. The party, sponsored by InStyle, went on into the night - and Paul McCartney was reportedly "truly getting down on the dancefloor" until it was over (sadly, no photos of that were allowed...).

Chairman and CEO of Atlantic Records Craig Kallman (left) with Neil Young (Photo by Frank Micelotta/PictureGroup)

LYOR Lyor Cohen and Warner Music Group owner Len Blavatnik pose together. (Photo by Vince Bucci/PictureGroup)

Lyor Cohen with Debra L. Lee, Chairman and CEO of BET Holdings. (Photo by Frank Micelotta/PictureGroup)