Chic winter whites and pales and on-the-go ensembles were the two prevailing themes this week, from **Rosamund Pike'**s turtlenecked Valentino to **Sienna Miller'**s savvy stripes. WHO: Rosamund Pike WHAT: Valentino Couture WHERE: Critics' Choice Movie Awards, Los Angeles WHEN: January 15, 2015 WHO: Keira Knightley WHAT: Delpozo WHERE: Critics' Choice Movie Awards, Los Angeles WHEN: January 15, 2015 WHO: Kate Bosworth WHAT: J. Mendel jacket, Oscar de la Renta dress WHERE: Still Alice screening, New York City WHEN: January 13, 2015 WHO: Marion Cotillard WHAT: Christian Dior Couture WHERE: Critics' Choice Movie Awards, Los Angeles WHEN: January 15, 2015 WHO: Julianne Moore WHAT: Alexander McQueen WHERE: Still Alice screening, New York City WHEN: January 13, 2015 WHO: Kristen Stewart WHAT: Jonathan Simkhai top and Sandro suit WHERE: On the street, New York City WHEN: January 15, 2015 WHO: Kate Moss WHERE: On the street, London WHEN: January 12, 2015 WHO: Amber Heard WHERE: Arriving to Jimmy Kimmel Live!, Hollywood WHEN: January 15, 2015 WHO: Sienna Miller WHAT: Sonia Rykiel shoes, Jennifer Fisher jewelry WHERE: Arriving to The Daily Show with Jon Stewart, New York City WHEN: January 15, 2015 WHO: Stella McCartney WHAT: Stella McCartney WHERE: Heathrow Airport, London WHEN: January 13, 2015