Alexa Chung attends the Christian Siriano show during, New York Fashion Week: The Shows at The Plaza Hotel on February 11, 2017 in New York City. (Photo by Jamie McCarthy/Getty Images for New York Fashion Week)
Louise Roe attends the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Ella Purnell attends the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Model Emily Ratajkowski attends the Michael Kors Collection Fall 2017 runway show at Spring Studios on February 15, 2017 in New York City. (Photo by Jamie McCarthy/Getty Images for Michael Kors)
Actor Elizabeth Hurley attends WCRF's "An Unforgettable Evening" presented by Saks Fifth Avenue at the Beverly Wilshire Four Seasons Hotel on February 16, 2017 in Beverly Hills, California. (Photo by Alberto E. Rodriguez/Getty Images)
Actress Michelle Williams attends the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Sophie Turner attends the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Beth Ditto attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Adele arrives for the 59th Grammy Awards pre-telecast on February 12, 2017, in Los Angeles, California. (Photo MARK RALSTON/AFP/Getty Images)
Model Heidi Klum attends The 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
Model Heidi Klum attends The 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
Thandie Newton attends the official after party for the 70th EE British Academy Film Awards (BAFTA) at The Grosvenor House Hotel on February 12, 2017 in London, England. (Photo by Tim P. Whitby/Getty Images)
Blake Lively poses backstage before the Michael Kors Collection Fall 2017 runway show at Spring Studios on February 15, 2017 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Michael Kors)
Zoe Kravitz attends the Alexander Wang February 2017 fashion show during New York Fashion Week on February 11, 2017 in New York City. (Photo by Jason Kempin/Getty Images)
Grace Van Patten attends the Alexander Wang February 2017 fashion show during New York Fashion Week on February 11, 2017 in New York City. (Photo by Jason Kempin/Getty Images)
Grace Van Patten attends the Alexander Wang February 2017 fashion show during New York Fashion Week on February 11, 2017 in New York City. (Photo by Jason Kempin/Getty Images)
Actress Gillian Anderson attends the 'Viceroy's House' premiere during the 67th Berlinale International Film Festival Berlin at Berlinale Palace on February 12, 2017 in Berlin, Germany. (Photo by Pascal Le Segretain/Getty Images)
Actress Gillian Anderson attends the 'Viceroy's House' premiere during the 67th Berlinale International Film Festival Berlin at Berlinale Palace on February 12, 2017 in Berlin, Germany. (Photo by Pascal Le Segretain/Getty Images)
Actress Emily Blunt attends the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Felicity Jones poses in the winners room during the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Julia Stiles attends the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Millie Mackintosh attends the 70th EE British Academy Film Awards (BAFTA) at Royal Albert Hall on February 12, 2017 in London, England. (Photo by Chris Jackson/Getty Images)
Lea Michele attends The 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images for NARAS)
Isabelle Huppert attends the official after party for the 70th EE British Academy Film Awards (BAFTA) at The Grosvenor House Hotel on February 12, 2017 in London, England. (Photo by Tim P. Whitby/Getty Images)
Felicity Jones attends the official after party for the 70th EE British Academy Film Awards (BAFTA) at The Grosvenor House Hotel on February 12, 2017 in London, England. (Photo by Tim P. Whitby/Getty Images)
Viola Davis attends the official after party for the 70th EE British Academy Film Awards (BAFTA) at The Grosvenor House Hotel on February 12, 2017 in London, England. (Photo by Tim P. Whitby/Getty Images)
Holliday Grainger attends the official after party for the 70th EE British Academy Film Awards (BAFTA) at The Grosvenor House Hotel on February 12, 2017 in London, England. (Photo by Tim P. Whitby/Getty Images)
Jennifer Lopez attends The 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
Adele performs onstage during The 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Kevin Winter/Getty Images for NARAS)
Actress Rose Leslie attends the Altuzarra fashion show during New York Fashion Week on February 12, 2017 in New York City. (Photo by Astrid Stawiarz/Getty Images)
Model Emily Ratajkowski attend the Altuzarra fashion show during New York Fashion Week on February 12, 2017 in New York City. (Photo by Astrid Stawiarz/Getty Images)
Charli XCX arrives for the 59th Grammy Awards on February 12, 2017, in Los Angeles, California. (Photo MARK RALSTON/AFP/Getty Images)
Actress Caroline D'Amore attends The 59th GRAMMY Awards at STAPLES Center on February 12, 2017 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images for NARAS)
Maya James attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Eliza Cummings attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Alexa Chung attends the Proenza Schouler collection during, New York Fashion Week: The Shows on February 13, 2017 in New York City. (Photo by Ben Gabbe/Getty Images)
Damaris Goddrie attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Ellie Bamber attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Arizona Muse attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Thandie Newton attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Clara Amfo attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Eleanor Tomlinson attends the Elle Style Awards 2017 on February 13, 2017 in London, England. (Photo by Gareth Cattermole/Getty Images)
Actress Diane Kruger attends the Tory Burch FW17 Show during New York Fashion Week at the Whitney Museum of American Art on February 14, 2017 in New York City. (Photo by Cindy Ord/Getty Images for Tory Burch)
Model Jourdan Dunn attends the Michael Kors Collection Fall 2017 runway show at Spring Studios on February 15, 2017 in New York City. (Photo by Jamie McCarthy/Getty Images for Michael Kors)
Sienna Miller arrives at 'The Lost City of Z' UK premiere at the British Museum on February 16, 2017 in London, United Kingdom. (Photo by Chris Jackson/Getty Images)
Katy Perry arrives at the Marc Jacobs Fall 2017 Show at Park Avenue Armory on February 16, 2017 in New York City. (Photo by Jamie McCarthy/Getty Images for Marc Jacobs)
Barbara Palvin attends the Sports Illustrated Swimsuit 2017 launch event at Center415 Event Space on February 16, 2017 in New York City. (Photo ANGELA WEISS/AFP/Getty Images)
Amber Valletta attends the Women's Cancer Research Fund's event 'An Unforgettable Evening' at the Beverly Wilshire hotel in Beverly Hills, California on February 16, 2017. (Photo CHRIS DELMAS/AFP/Getty Images)
Best Dressed of the Week - Feb 17