Justin Bieber, Jessica Simpson and Paris Hilton and other celebs are #SPOTTED on social media

FROM showing off their bikini bods to catching up with their besties, these celebs are having fun in the sun — check out today’s best social media shares.

Jessica Simpson, Justin Beiber and Alessandra Ambrosio are smoking hot in the summer sun. Pictures: Instagram

IF THESE pics are anything to go by, summer is already here.

It seems the warm weather has Australia looking towards the party season — and these celebs are no different.

From showing off their bikini bods, getting active on a run — or simply catching up poolside with their besties — check out today’s best celebrity social media shares.

So true, Jessica Simpson, so true: “If I’m in a bathing suit I should pose proudly”

After a whirlwind trip to Italy to celebrate her sister’s wedding Kylie Jenner is feeling the love with her besties: “Reunited and it feels a little too good.”

Justin Bieber proves he’s not just talking the talk with all his shirtless selfies. The pint-sized popstar apparently also likes to run that run. In this pic he’s pairing up with none other than Usher: “Runnin with @howuseeit who do u think is faster”. We’re not sure, Justin, but we know who likes to run their mouth off more!

Smoking Brazilian Victoria’s Secret model Alessandra Ambrosio shows just how multi-talented she can be. The mother of two and fitness aficionado asks her followers, “Who wants some BBQ ? #memorialday #holiday #summertime #Foreveronvacation”

These sweet newlyweds are never at a loss when it comes time for a selfie, but we’re not complaining. Kaley Cuoco and Ryan Sweeting share, “Celebrating Memorial Day in style :)”

Ahh yes, Jason Dundas, we get it. You live next to Australia’s most famous beach: “I’m a little excited about my new apartment! #bondibeach #airbnb”

Don’t worry, Havana Brown, no one said Simon says ... the fun-loving DJ shares her curious pose with her fans while enjoying the sun in Miami. “Who loves summer??? MEEEE! #LA #Miami #Summer #Love”

It’s been a whirlwind month for model Cassi Van Den Dungen as she grapples with her changing look: “In the past 3 weeks I’ve gone from brown to bright blonde and now still blonde just a bit darker blonde for @calvinklein. I would like to say a massive thank you to #CaterinaDibiase from @hohb_aus for cutting and dying my hair. You’re #amazing babe. Haven’t changed my hair for so long and I’m loving the change. #modellife #lovemyjob #lovinglife #hongkong” At least the Aussie beauty is happy with her lot.

Ahh Paris Hilton, another day, another snap from a place we’d rather be: “#LovingLife in Monaco! Feel so happy, lucky and blessed.”

But the most precious share of the day comes from earth mother, Hilary Duff, who is right when she says, “This is everything.” Lovely.

Originally published as Justin Bieber, Jessica Simpson and Paris Hilton and other celebs are #SPOTTED on social media