Social Scene: Week of August 14

Mariah Carey hangs out with Serena Williams backstage, Nicki Minaj leaves little to the imagination in a sheer bodysuit and Kim Kardashian hangs out with her niece, Dream.

Those were just some of our favorite moments in the world of celebrity Instagrams this week.

SEE ALSO: Kim Kardashian literally sparkles in figure-hugging jumpsuit during 'secret' photo shoot: Watch!

Also on the list? Reese Witherspoon asks us to call her on her "shell phone," Ariana Grande sings an old Spice Girls tune, Kourtney Kardashian blows a kiss to a camel in Egypt and Yara Shahidi promoting her Always #LikeAGirl campaign.

More of our favorite snaps came from birthday boy Joe Jonas, Miley Cyrus and Rita Ora, who donned some pretty epic Paris Hilton sweatpants.

See our favorite celebrity Instagrams of the week:

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