Leslie Mann wore a gorgeous pink from Martin Grant with Louboutins to the premiere.  She carried a clutch from Judith Leiber and wore jewerly from Fred Leighton.

She was styled by Elizabeth Stewart.

Toni Collette wore a dress from Aussie house Sass & Bide with shoes from Opening Ceremony.  She carried a Jimmy Choo "Rumer" clutch.  Jewelry was her own.

She did not work with a stylist for this event.

Rashida Jones looked pulled together in a jacket from Comme des Garcons Black label with a top from American Apparel and skirt from Band of Outsiders.  Her shoes were from Stella McCartney and she carried a Jimmy Choo clutch.  Bangles and earrings were from XIV Karat.

She did not use a stylist for this event.

Elizabeth Banks wore a dress from MaxMara, and did not work with a stylist.

Aubrey Plaza wore a dress from Dolce & Gabbana with Brian Atwood shoes. Her earrings were amber & diamond from Bochic.  She carried a clutch from Louis Vuitton.

Emma Watson wore Proenza Schouler from the Resort 2010 collection with shoes from Burberry.  She was styled by Caroline Sieber.

Michelle Trachtenberg wore a casual ensemble of American Apparel leggings with a shirt from Tucker and a blazer from Topshop.  Her shoes were Guiseppe Zanotti and her bag was from Kooba.  Earrings and ring were from Rarities by Carol Brodie.  She did not work with a stylist for this event.

Ashanti also styled herself to attend the premiere.  She wore pop colors of an Herve Leger skirt with a Ramona LaRue top.  Her boots were also Guiseppe Zanotti.  Jewelry was from Lorraine Schwartz.

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Taylor Momsen wore a blouse from Rag & Bone and a jacket from Mikhael Kale.

Jessica Lowndes wore a Betsey Johnson dress with Bebe shoes and a Lia Sophia dress.

Shenae Grimes wore a Jack & Gill dress with Aldo shoes.  She does not work with a stylist.

Jessica Stroup wore a Brian Reyes dress with D&G shoes. She carried a Sergio Rossi bag and wore Neil Lane jewels.  She is styled by Lia Davis.

Leighton Meester wore a dark brown Jil Sander jacket and shorts with Brian Atwood shoes and Bvlgari shoes.  She is styled by Logan Horne.

Blake Lively wore an ADAM jumper with Christian Louboutin shoes.  She does not work with a stylist.

Katie Cassidy wore a top from L'Agence paired with a black leather vest from Anzevino and Florence.  Her harem pants were from American Apparel and belt from Emily Noelle.  Shoes are Camilla Skovgaard.  She is styled by Moses Moreno.

Nina Dobrev wore a summery BCBG dress.

AnnaLynne McCord wore a sexy D&G LBD.  She does not work with a stylist.

Ashlee Simpson wore a DSquared2 top & skirt with a Lanvin necklace and Lanvin shoes.

Later in the evening, Ashlee wore a vintage Chanel dress with John Galliano heels and Loree Rodkin jewelry to the private party.

Jessica Stroup changed into another Brian Reyes dress, a racer-back dress for the evening party.

Blake Lively changed into a Ralph Lauren Collection ensemble.

Serena Williams wore a Dolce & Gabbana dress with Louboutins.  Her handbag and jewelry are from Serena Signature Statement, her jewelry line that launches end of April.  Serena was styled by Nikki Burchiere.

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Taylor Swift wore a sparkly Collette Dinnigan with Louboutin peep-toe heels and carried a Jimmy Choo clutch.  Jewelry was from Lorraine Schwartz.  Taylor is styled by Joseph Cassell.

Whitney Houston wore Dolce & Gabbana to perform at Clive Davis' annual pre-Grammy party.  Whitney is styled by Timothy Snell.

Rihanna wore a dress by Roberto Cavalli.  Jewelry was yellow gold Croco cuffs and a gold & diamond ring from Hellmuth. 

Katy Perry wore a Georges Chakra dress with Louboutins and a clutch from Renee Caovilla.  Earrings were from H. Stern and ring was Zorab.  Katy is styled by Johnny Wujeck.

Miley Cyrus wore a Cavalli dress, BCBG shoes, earrings by Bochic and a ring from Amrapali.  Miley was styled by Tara Swennen.

Jennifer Hudson (pictured with Clive Davis) wore a Todd Lynn dress with a Balenciaga bag, Ferragamo shoes and jewelry by Loree Rodkin to Clive Davis' annual pre-Grammy party.  Jennifer is styled by Lisa Michelle Boyd.

Keyshia Cole wore a dress by Grai, shoes from Givenchy, clutch from Swarovski and jewels from H. Stern.

Estelle wore a Fendi top with leggings by American Apparel.  Shoes were from Halston, clutch Calvin Klein and jewelry from Noir.

Sheryl Crow wore a dress from Ports 1961 with a bag from Mary Norton, jewelry from Pratt Vintage Jewelers, with Sheryl's own shoes.  Sheryl is styled by Wendi + Nicole.

American Idol judge Kara DioGuardi wore a Nicole Miller gown to the event.