What's been happening in celebrity selfies this week.

It’s that time of the week again, time to get your snap on with your favourite celebrities.

This week the celebs have been doing a lot of celebrating.

All the celebrating. Image via @jessicasimpson Instagram.

Jessica Simpson and her young family have been celebrating Ace's second birthday - having ALL the fun while David Campbell was having a solo celebration on TV about the return of his co-host Sonia Kruger.

Olivia Wilde attempted to recreate Ellen Degeneres' Oscar selfie - with Hilary Clinton as her centre piece.

Blake Lively was smooching a giraffe while Hilary Duff was snuggling up with her fluffy pooch. And Colin Fassnidge, Justin Timberlake and Alec Baldwin all had some daddy time with their kids, which was adorable.

SCROLL THROUGH the gallery to see what else your favourite celebrities have been up to this week…

Olivia Wilde tries to emulate Ellen's famousOscar selfie with Hilary Clinton. Image via @oliviaiwlde

Jessica Simpson's gorgeous family celebrating Ace's second birthday. Image via @jessicasimpson.

Jessica Simpson's duaghter, Maxwell's hair was centre of attention.

Ace enjoying his second birthday. Image via @jessicasimpson

Jessica Simpson celebrates Ace's 2nd Birthday. Image via @jessicasimpson

Justin Timberlake posts a photo congratulating himself on joining the Fathers Club. Image via Instagram.

Colin Fassnidge having 3 am wars with his toddler. Image via @cfassnidge.

Caitlyn Jenner poses alongside other trans women in NYC. Image via Instagram.

Reese Witherspoon poses with her large cup of coffee for a pit stop. Image via Instagram.

Jessica Alba takes her daughters to Disneyworld to see the Frozen exhibit. Image via Instagram.

Jennifer Hawkins poses for a photo between takes of Australia's Next Top Model. Image via Instagram.

Sam Armytage and Kochie pose in their pyjamas for the camera. Image via Instagram.

Drew Barrymore celebrates International Sunny Day. Image via Instagram.

David Campbell celebrates the return of Sonia Kruger. Image via Instagram.

Hugh Jackman asks Instagram to caption this photo. Any suggestions? Image via Instagram.

Sofia Vergara and hubby Joe Manganiello pose at Lucha Libre (Spanish Wrestling). Image via Instagram.

Ricky Martin stepping out of a private jet to land in Buenos Aires. Image via Instagram.

Chris Bath posts a flashback photo that her husband found. Image via Instagram.

Kate Hudson celebrates her week with some win. Image via Instagram.

Miranda Kerr posted this photo of her legs to announce her new Swarovski campaign. Image via Instagram.

Megan Gale posted this photo of her baby boy River and hubby Shaun playing on the swing. Image via Instagram.

Kate Hudson and friends fooling around. Image via @katehudson

Mariah Carey and her daughter. Image via @mariahcarey

Eric Stonestreet not looking too happy. Image via @ericstonestreet

Blake Lively and her new friend. Image via @blakelively

Sofia Vergara's on set selfie. Image via @sofiavergara

Kylie Minogue. Image via @kylieminogue

Hilary Duff and her fluffy pal. Image via @hilaryduff

Channing Tatum with wife Jenna Dewan.

J-lo and her little one. Image via @jlo

David Beckham and his mum. image via @davidbeckham

Kourtney and Khloe Kardashian sister shot. Image via @kourtneykardashian

Oprah shows off her green thumb. Image via @oprah

Kim Kardashian graced us with a classic Kimmy-K Selfie...Image via @kimkardashian

Hugh Jackman is a little sweaty. Image via @thehugujackman

Kim Kardashian. Image via @kimkardashian

Amanda Seyfriend.Image via @mingey

Miranda Kerr is soaking up some sun. Image via @mirandakerr

Pixie Curtis is off to school. Image via @pixiecurtis

Rachel Zoe enjoying the weekend. Image via @rachelzoe.

Sylvia Jefferies is feeding a goat? Image via @sylviajefferies

The Baldwin's at the beach. Image via @hileriabaldwin

Theresa Palmer throwback. Image via @tez_palmer

Ciara having a bite to eat. Image via @ciara

Amanda Seyfried. Image via @mingey

Mandy Moore has found a friend. Image via @mandymooremm

Serena Williams at the Taylor Swift concert. Image via @serenawilliams

Ricks-Lee enjoying an afternoon drink. Image via @therickilee

Ricks-Lee showing that hard work pays off. Image via @therickilee

Michelle Obama reading to children in Italy. Image via @michelleobama

Katherine Heigl is horsing around. Image via @Katherineheigl

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