Star Tracks: Celebs on Social

01 of 21

SERENA WILLIAMS

The tennis champ cuddles with daughter Alexis Olympia.

02 of 21

LEA MICHELE

The Mayor actress jumps for joy during a sultry bedroom photoshoot.

03 of 21

GWYNETH PALTROW

Just one day after speaking out against producer Harvey Weinstein, the actress penned a sweet note to her daughter, Apple, on Instagram in honor of International Day of the Girl. "Everything I do in my life I do for this girl (and her brother)," the mom captioned the image.

04 of 21

SIA

tonya-brewer-2000 — Tonya Brewer Instagram

The "Titanium" singer usually hides her face behind an elaborate wig, but she certainly was not hiding on Tuesday. She dared to bare not only her face but also her right breast.

05 of 21

CIARA & JANET JACKSON

janet-jackson-ciara-disneyland — Ciara Instagram

The performers are total Disney darlings as they snap a selfie at Disneyland, where they spent the day with their kids.

06 of 21

DAISY SUDEIKIS

"My curious, courageous one, I promise we'll work hard to make this place better for you and your sisters everywhere," mom Olivia Wilde captioned a photo of an intrigued-looking Daisy gazing out a window, in honor of her daughter's 1st birthday. "We've taken some hits recently, but I believe we are even more determined because of it."

07 of 21

PADMA LAKSHMI & KRISHNA THEA

The Top Chef host's daughter Krishna Thea is (literally) a mirror image of her famous mother. She captioned the snap with the hashtags: "#TwinningAndWinning #CantStopWontStop."

08 of 21

JENNY MOLLEN

The mother of two shared a one-week update showing how she is healing on Instagram with a mirror selfie. "One week post op. Staples out. Steri strips on," Mollen, who welcomed son Lazlo with husband Jason Biggs, captioned the photo that showed white wound closure strips on her C-section scar.

09 of 21

TRACEE ELLIS ROSS

The Golden Globe Award-winning actress decided to get the inside of her nostrils waxed and left nothing to the imagination when she shared the painful process she endured with her fans on Instagram. "Just say no," she wrote of the experience.

10 of 21

KHLOÉ KARDASHIAN & KYLIE JENNER

They're twinning! The pregnant sisters show off their uncanny resemblance during an impromptu photoshoot.

11 of 21

BELLA HADID

Well, that's one way to ring in her 21st birthday. The supermodel opts for a g-string on Tuesday.

12 of 21

HEIDI MONTAG & SPENCER PRATT

heidi-spencer-pratt — Heidi Pratt/Instagram

Before Gunner Stone, there was just Speidi — enjoying some of their last moments as a duo by channeling The Lion King.

13 of 21

PEREZ HILTON

The 39-year-old father of two and infamous gossip blogger (whose given name is Mario Armando Lavandeira, Jr.) welcomed daughter Mayte Amor (via surrogate) on Oct. 4. "I am beaming with joy and pride as I share with you that my family has grown yet again," he wrote in the sweet picture’s caption, adding "she's perfect."

14 of 21

CHLOË GRACE MORETZ & BROOKLYN BECKHAM

They're back on! Shortly after reconciling, the cute celeb couple treats themselves to beer in Dublin, Ireland.

15 of 21

SOFIA VERGARA

The Modern Family actress supports breast cancer awareness month by sharing a short video documenting her latest mammogram. Standing in front of a mammography unit wearing a robe, she wrote "You have to do it!!!!"

16 of 21

AARON CARTER

Carter returns to social media on Saturday to show off the 30 lb. weight gain he experienced over "a few weeks" of focusing on himself and his health. “From 115 pounds to 145 in a few weeks,” Cater wrote on Instagram. “On the left 115. On the right 145 Continuing to focus on myself and my health. #proudofmyself #StressFree. Needed some time to heal and this is a direct result.”

17 of 21

APRIL LOVE GEARY

april-geary — April Love Geary/Instagram

Robin Thicke's girlfriend shows off her growing baby bump on Instagram in a sweet bikini selfie. "Already so in love with you," she captioned the picture.

18 of 21

BEYONCÉ

We can thank Miss Tina Lawson for this adorable Queen Bey throwback, which proves the Grammy winner is the spitting image of daughter Blue Ivy.

19 of 21

ARIANA GRANDE

The singer shows off her newly dyed gray hair on Instagram, clarifying that even though it looked like a purple-tinged silver in the photo, it was actually gray. "Btw (it’s grey)," she captioned the photo, which she put a heart-filled filter on.

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