Chloe Sevigny hung out with Lance Bass at Hugo Boss; Brooklyn Decker and Vanessa Hudgens head to CDFA's launch of MyHabit.com; new LES restaurant/bar Co-Op became an instant hit; Ashton Kutcher feted taking over Charlie Sheen's role at CBS; Kelly Bensimon celebrated her amNewYork column; a Jonas brother came to an event and more! Last night's parties were anything but wholesome!

HUGO BOSS Celebrates HUGO on Greene Street in Honor of the Young Collectors Council of the Solomon R. Guggenheim Museum

Where: Hugo Boss

Who Was There: Ryan Kwanten, Chloe Sevigny, Henrik Lundqvist, Claus-Dietrich Lahrs (Hugo Boss / Chairman & CEO), Eyan Allen (Hugo Boss / Creative Director), Alex Pettyfer, Lance Bass, Olivia Palermo, Johannes Hueble, Hannah Bronfman, Robert Verdi,  Carlos Souza, Carlos Mota

Other Details: Fashion types convened last night at Hugo Boss to honor the Guggenheim's Young Collectors. Chloe Sevigny hung out with mutual child of the '90's Lance Bass like some sort of surreal time-warp dream. Alex Pettyfer most likely surveyed the room thinking about how many people were thinking about his penis tattoo the whole night, and Olivia Palermo looked gorgeous as usual despite the rain. [Via]

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MyHabit.com Launch Party [Take a look at photos HERE]

Where: Skylight Studios West

Who Was There: Brooklyn Decker, Vanessa Hudgens, Bibhu Mohapatra, Prabal Gurung, Lara Meiland Shaw, Christian Siriano, Waris Ahluwalia, Julie Gilhart, Diane von Furstenberg

Other Details: Everyone in fashion (and Vanessa Hudgens) was at the CDFA's launch of MyHabit. The site launched May 5th and is already generating quite the buzz in the online fashion world.  In collaboration with the Council of Fashion Designers of America (CFDA), MyHabit has released a limited edition graphic t-shirts to commemorate the site's launch designed by the inaugural class of CFDA Fashion Incubator designers. Be sure to take a look at more photos HERE.

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CO-OP FOOD and DRINK RESTAURANT PREVIEW PARTY [Take a look at photos HERE]

Where: Hotel on Rivington

Who Was There: Chloe Sevigny, Betsy Johnson, Jason Apfelbaum, Alan Philips, Tara Subkoff, Tom Hooper, Jean Shafiroff, R. Coury Hay, Michael Stipe, Debbie Harry, Paul Sevigny, Jill Zarin, Linda Fargo, Melissa Berkelhammer, Natasha Lyonne, Waris Ahluwalia, Byrdie Bell

Other Details: It's been a while since there was a party in New York that felt like everyone in the city was there, but last night succeeded in this. And it was raining! Actress and designer Tara Subkoff hosted the event and designed the uniform for staff. The inside is totally different from Thor (RIP) with images by EJ Camp of Moby, Debbie Harry, Michael Musto and others hanging on the walls. The food is modern American brasserie and sushi bar prepared by Executive Chef John Keller, formerly of Le Bernardin and Nobu, that is locally sourced and meant to be shared. Be sure to take a look at more photos HERE.

KIEHL'S 160th Aniversary Celebration

Where: 103 Third ave

Who Was There: Mia Moretti, Caitlin Moe, Richie Rich, Susan Sarandon, Kevin Jonas, Leigh Lezark

Other Details: Kiehl's not only makes the best skin products, their parties are always a good time. Always. Last night's party, celebrating their 160th birthday was packed. Not only were the usual suspects there, but so was a Jonas Brother! Kevin (who for those of you not up on your Tiger Beat reading is the least attractive one who is married and gets to have purity ring-less s-e-x) must be a big fan of the products, because there is no other explanation. Always good to see people come out because they really like something. The gift bags were stuffed full and well worth it! [Via]

CBS UPFRONT 2011

Where: The Tent at Lincoln Center

Who Was There: Jon Cryer, Ashton Kutcher, Angus T. Jones, Amy Carlson, Alan Cumming, Beth Behrs, Chris O'Donnell, LL Cool J, Cobie Smulders, Neil Patrick Harris, Drew Carey

Other Details: CBS said goodbye to Charlie Sheen and Katie Couric last night with a party. It was officially announced that Ashton Kutcher will take the lead role in Winning on Two and a Half Men. I still won't be watching.  What does look good is Kat Denning's new show Two Broke Girls. [Via]

TNT UPFRONT 2011

Where: Hammerstein Ballroom

Who Was There: Jada Pinkett Smith, Marc Anthony, George Lopez, Ray Romano, Sasha Alexander, Conan O'Brien, Angie Harmon, Jason Lee, Noah Wyle, Rachael Leigh Cook

Other Details: TNT knows drama. TV Fanatic reports that during the event a video clip failed to work during Conan O'Brien's monologue.  "I flew three thousand miles to be here and had two hours of sleep... We gonna try that again?" he said. [Via]

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Ocean Inspiration: A Tribute to Jacques Cousteau [Take a look at photos HERE]

Where: Sea Grill at Rockefeller Center

Other Details: A celebrity chef oversaw the menu and Derek Stratton of Pilobolus premiered an original dance. Guests bid on  live auction items including a Patagonia excursion in Chile, an electric vehicle rental package, a cosmetic/spa package, and more! In addition, WRI presented  findings from its recent analysis of the state of the world’s coral reefs. La Prairie sponsored making this one amazing gift bag! Take a look at more photos HERE.

LA MER & OCEANA Celebrate World Ocean’s Day 2011

Where: Affirmation Arts

Who Was There: Nina Dobrev, Ian Somerhalder, Maureen Case, Theodora Richards, Molly Sims, Rachel Roy, Kerry Washington, Susan Cohn Rockefeller

Other Details: Happy Ocean Day!  Be good to them. Ian Somerhalder wants you to be. So does La Mer. Do it for them if not for Mother Earth. [Via]

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Y-3 PRESENTS YOHJI YAMAMOTO: THIS IS MY DREAM Documentary Screening

Where: The Tribeca Grand Hotel

Image in Cart

Who Was There: Chrissa Theodore, Michelle Harper, Theodora Sopko, Sarah Ellison, Christine de Lassus, John Hullum, Casey Spooner, Ariana Speyer, Patrick Sullivan

Other Details: To commemorate ten years of the Y-3 collaboration with the designer, Adidas has released a documentary, Yohji Yamamoto: This is My Dream. Guests got a special sneak peek and word on the street is, it's good. [Via]

amNEWYORK Welcomes KELLY KILLOREN BENSIMON & PATRICK MCMULLAN To The Family

Where: Chelsea Room

Who Was There: Kelly Killoren Bensimon, Patrick McMullan, Jessica White, Cindy Barshop, Jill Zarin,  LuAnn de Lesseps

Other Details: The ladies of Bravo were out in full force last night to support their Housewives of New York castmate Kelly Killoren Bensimon. She's got a new column in free subway paper amNewYork that she told  Keith Kelly would focus on "a little bit of everything: fashion, food, accessories, restaurants, sports, the arts.” She used to write for Elle Accessories and Gotham so take a look before you dismiss it as beauty tips and jelly bean mumbles.

New Museum celebrates opening of Apichatpong Weerasethakul: Primitive & Gustav Metzger: Historic Photographs

Where: New Museum

Who Was There: Lisa Phillips, Rirkrit Tiravanija, Massimiliano Gioni, Gary Parrion-Muyari, Apichatpong Weerasethakul

Other Details: New Museum celebrated two new exhibits. "Gustav Metzger : Historic Photographs" is the first solo museum exhibition in the United States of the influential eighty-five-year-old artist and activist Gustav Metzger. "Apichatpong Weerasethakul : Primitive" is the first New York exhibition devoted to the work of the internationally acclaimed Thai artist and filmmaker Apichatpong Weerasethaku.

Lykke Li Exclusive After Party

Where: Apotheke

Who Was There: Byrdie Bell, Scott Lipps, Man Repeller's Leandra Medine, Fiona Byrne

Other Details: After singer Lykke Li's performance last night Kanon Organic Vodka and Apotheke hosted her exclusive after party. Guests sipped on Kanon infused cocktails and danced to the tunes of DJ Chrissie Miller.