Victoria Beckham's back on the stage and the stars love National Sibling Day

From throwbacks to fancy dress: this week's best A-List Instagrams

Lena Dunham models her dream look

Naomi Watts snaps a selfie with Bill Murray

Victoria Beckham finds her long lost twin

Lady Gaga stays glam on the road

Reese Witherspoon throws it back

Emily Ratajkowski is a make-up pro

Jourdan Dunn rocks a purple 'do

Emma Roberts does what it takes

Madonna's in the dog house

Mindy Kaling works a retro look

Taylor Swift is almost unrecognisable

Ciara takes over Disney

Allison Williams shares a bare-faced selfie in honour of her birthday

...while Katy Perry pulls out all the stops

Victoria Beckham couldn't resist...

Kate Hudson reveals her hair inspiration

The Olsen twins share their first public selfie

Uma Thurman shows her support for Naomi Campbell

Taylor Swift gets busy in the kitchen

Naomie Harris couldn't wait for lunchtime

Diane Kruger reveals her in flight tipple of choice

Gigi Hadid is an avid Lakers fan

Anna Kendrick isn't one for the basic life

Jessica Chastain gets by with a little help from her friends

... not forgetting Charlize Theron and Emily Blunt

Emily Ratajkowski shows off a hidden message

Lena Dunham takes on the  streets of New York

Amy Schumer hints at a frightful night ahead

Zoe Saldana reveals her look of the day

Jessica Chastain supports Charlize Theron

Lupita Nyong'o celebrates the power of women

Naomie Harris goes all out for a Knicks game

Emma Roberts spends time at the musuem

Kerry Washington flashes her nail art

Victoria Beckham returns to the stage

... and takes time to relax in wine country

Diane Kruger shows off her wedding guest style

... and takes a quiet moment to enjoy the view

Emilia Clarke checks off her bucket list

... and lets out her Queen B

Maisie Williams gets ready for Game of Thrones

... but her mind was elsewhere

Kate Hudson adapts to mountain life

... before enjoying wedding festivities

... and sharing her love for her brothers on National Sibling Day

Jessica Alba shares a cheeky throwback

Naomi Watts sends love to her brother

Florence joins the Lively crew

Lena Dunham shouts out to her sister

Amy Schumer perfects sibling sharing

... and shares a snap with her brother

Karlie Kloss isn't convinced by their sister style

The Kardashian sisters enjoy a weekend work out

Kendall Jenner needs help tying her laces

It was a high fashion affair at Naomi Campbell's book launch

Chrissy Teigen and John Legend change up their look

Emily Ratajowski gets cosy with the pup

Rebel Wilson gets jiggy with Will Smith

This week's best A-List Instagrams