From Christy Turlington to Natalie Portman, here are five of the most anticipated beauty campaigns for 2011.

Natalie Portman for Dior: The American actress has been making headlines everywhere lately for her performance in Black Swan.

On Wednesday, Portman nabbed yet another leading role when Dior named her the new face of Miss Dior Chérie, one of the brand’s iconic fragrances.

A series of print ads shot by Tim Walker and a TV campaign shot by Sofia Coppola will be released in March. This is Portman’s first time representing a beauty brand.

Lady Gaga for MAC: MAC Cosmetics has signed Lady Gaga on for a second year as the official spokeswoman for its Viva Glam campaign, benefiting the MAC Aids fund.

The pop singer teamed up with Cyndi Lauper for its 2010 campaign, which MAC executives said was the most successful ever.

The outlandish star, known for her larger-than-life persona, will pose solo in 2011. The ads will be shot by Nick Knight and styled by Nicola Formichetti.

Jennifer Lopez for L’Oréal: The American actress/singer has been unveiled as the new face of cosmetics giant L’Oreal Paris, joining Beyonce, Eva Longoria and Milla Jovovich as a global brand ambassador.

Lopez inked a multi-year, multimillion-dollar contract with the company to represent a number of its lines, starting with ads for its EverSleek haircare products, slated to be released in January 2011.

Julia Restoin Roitfield for Lancôme: Following Kate Winslet, Julia Roberts, and Penelope Cruz, the daughter of stylish Vogue Paris editor Carine Roitfield has been chosen as the new face of the French beauty brand.

She fronts the new campaign for Lancôme‘s Ultra Lavande spring 2011 collection, shot by famed fashion photographer Mario Testino.

Roitfield is also set to star in a campaign in Asia for Lancome’s Blanc Expert line later in the year.

Christy Turlington for Avon: After serving as the face of Calvin Klein’s Eternity fragrance, the ex-supermodel has partnered with the US beauty giant to launch Avon’s new women’s fragrance Slip Into, slated for release in January.

The musky fragrance — with rosewood and orchid heart notes — is supposed to invoke the feeling of putting on a pair of glamorous high heels. The ad shows a very sultry Turlington in a blue dress and strappy heels.