Lupita Nyong'o continues to give us vacation envy with her dreamy Bali snaps, while Sophie Turner trades her signature flame-red hair for a new blonde 'do and Reese Witherspoon celebrates National Girlfriends Day.  Come dive into all the A-list Instagram action, right here.

This week's best A-List Instagrams

Sophie Turner reveals her new 'do

Miley Cyrus mucks in

Reese Witherspoon celebrates National Girlfriends Day with Jessica Alba

Cara Delevinge poses with Will and Jaden Smith

Lupita Nyong'o keeps the holiday snaps coming

Lena Dunham hits the water

Kate Hudson keeps her wine close

Lupita Nyong'o takes in the view

Alexa Chung hangs loose

Diane Kruger gets some new wheels

Reese Witherspoon enjoys some mother-son time

Kate Bosworth steps into the night

Brooklyn Beckham congratulates Chloë Grace Moretz on her Teen Choice Award

Jessica Alba celebrates her sister-in-law

From Lupita Nyong'o's travel snaps to Sophie Turner's new 'do

From Lupita Nyong'o's travel snaps to Sophie Turner's new hairdo: this week's best A-List Instagrams