Last Night's Parties: Zac Efron Parties With His Skateboard At Spare Room, "True Blood" Stars Celebrate Season 4

[Nicole Richie, Charlotte Ronson photo courtesy of Shadow PR] Stars of "True Blood" have a heart and are nice to their fans at the season 4 premiere and after party, plus will Sookie Stackhouse be tanner this season?; GUESS partners with MOCA in Santa Monica for a party of young starlets like Sarah Hyland and teaches them how to do graffiti; Zac Efron parties with his skateboard at Spare Room for Charlotte Ronson's I "Heart" Ronson celebration, Paris Hilton, Ashlee Simpson, Danny Masterson and Nicole Richie were also there—this and more was just another L.A.Tuesday night, get it all here with today's edition of Last Night's Parties!

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I "Heart" Ronson For jcpenney Launch Event

Where: Spare Room Who Was There: Charlotte Ronson, Ashlee Simpson, Zac Efron, Jordana Brewster, Cory Kennedy, Aiden Demarest, Alice Eve, Alixandra Berg, Barbara Adler, Brent Bolthouse, Charles Adesanya, Charlotte Ronson, Cisco Adler, Dalya Benor, Danielle Pierson, Danny Masterson, Elise Williams, Felix Foto, Gabe Kahsay, Hedi Gores, Jason Tyler, Jessica Pastor, Jimmy Collins, Kate Sumner, Kelly Patricof, Kierstyn Moore, Louie Picarazzi, Marc Rose, Marina Chairez, Mikey Love, Molly Grant, Monet Mazur, Nicky Hilton, Nicole Richie, Nikki Rozazi, Olivia Golvin, Paris Hilton, Rashida Jones, Sabrina Matlooz, Samantha Ronson, Shawn Barnett, Sierra Rankow, Vinnie Marquez. Other Details: Last night, designer and member of the Ronson/Dexter-Jones dynasty, Charlotte Ronson celebrated the launch of her exclusive summer sportswear collection for jcpenney, I "Heart" Ronson, at Spare Room. The venue was packed with a young crowd enjoying cocktails, bowling, games and tunes courtesy of twin sister Samantha Ronson. Guests got to browse the celebrated collection and took home some nice silk-screened totes as parting gifts. You can never have too many. Aside from a look from Nicole Richie that can only mean she was jealous of my outfit (don't worry, you looked totally cute too, Nic!), the highlight of the night was definitely seeing Zac Efron and his buddies saunter in holding skateboards, no big deal. Like, who doesn't skate to events? Did you not know that's like the thing to do now? Apparently the Roosevelt valet wouldn't park them but something tells me Zac and his crew would have preferred to keep their boards with them for the party to complete the Z-boys look. He's not over losing that role to Emile. Sad, really... [Nicole Richie, Paris Hilton photo courtesy of Shadow PR]

"True Blood" Season 4 Premiere After Party

Where: Social Hollywood Who Was There: Alan Ball, Anna Paquin, Joe Manganiello, Missy Yager, Ryan Kwanten, Sam Trammell, Stephen Moyer, Evan Rachel Wood, Brandon Routh, Alexander Skarsgard, Michael Emerson, Noa Tishby, Paola Turbay, Rutina Wesley, Deborah Ann Woll, E.J. Scott, Courtney Ford. Other Details: Last night, HBO screened their premiere episode of the much anticipated Season 4 return of "True Blood" for a select crowd at the Arclight followed by a post-screening celebration at Social Hollywood.  Stars of the show indulged their clamoring fans crowding Sunset Blvd, signing autographs and posing for photos. Meanwhile, inside Anna Paquin cozied with husband and co-star Stephen Moyer (how they're not sick of each other, I'm not sure) sporting what looks like a nice summer tan.  Get it, gurl. [Photo via]

GUESS + MOCA Grand Reopening: "Art On Third Street"

Where: GUESS Flagship, Santa Monica Who Was There: Sarah Hyland, Christian Serratos, Igal Dahan, Jaimie Hilfiger, Jeffery Deitch, Madeline Zima, Matt Prokop, Maurice Marciano, TIffany Thornton, Beth Behrs, Claire Coffee, Jordan Matthews, Esme Bianco, Krista Mills. Other Details: For the grand reopening of their newly revamped flagship store at Third Street Promenade in Santa Monica, GUESS teamed up with MOCA in honor of their must-see street art exhibition "Art in the Streets". Guests, including a handful of young Hollywood talent, were invited out to the new GUESS digs decorated with graffiti installations for a cocktail party featuring interactive art experiences with contemporary artist Tiffany Trenda and The Busbys. Thanks to the live graffiti painting and DIY graffiti walls, the crowd also got the opportunity to practice their tagging skills, for a good cause, of course, with 10% of the night's shopping proceeds benefiting MOCA.  [Photo by Christopher Polk courtesy of PMK-BNC]