Best Celebrity Instagrams Of The Week: One Direction Reunites With Katy Perry, Miley Cyrus Rocks Long Brown Locks and More!

Katy Perry shares as special bond with the cuties of One Direction as she pecked Niall Horan and Harry Styles on the lips at the MTV VMAs. Ever since the popstar and boybanders have been in love. It looks like Niall was extra excited to be reunited with his celeb crush by planting a big kiss on Katy's cheek!

They may live at the White House now, but that doesn't mean Michelle and Barack Obama don't still open their home to trick-or-treaters!

"Who says Kanye West never smiles?" Ryan Seacrest asked fans. We wish Yeezus would show off those perfect pearly whites more often!

Alessandra Ambrosio put away her Victoria's Secret angel wings for a "devlish" Halloween adventure with the family!

Can you guess which starlet this Throwback Thursday shot belongs to? Drumroll please...Emma Roberts!

Ariana Grande was radiant in red while celebrating her grandfather's 90th birthday with family and friends.

Woah! We didn't realize how long Miley Cyrus has been rocking the bleach blonde pixie cut until seeing this photo. While it's only a wig, the long brown locks threw us completely for a loop!

Grey's Anatomy fans—check out this shot of Ellen Pompeo and Kevin McKidd goofing around on set. It's nice to know the cast have as much fun filming as we do watching!

Tia Mowry and her son Cree had fun in character as a Geisha and Spongebob Squarepants.

Tamera Mowry also got into the Halloween spirit with a family portrait showcasing their matching vampire ensembles.

Jesse Tyler Ferguson shared this behind-the-scenes shot of Eric Stonestreet with a hilarious caption that read, "So a Clown, a Cam and a Santa walk into a bar..."

Kanye West's Los Angeles concert was a star studded affair. Jessica Alba and Craig Robinson were a few of the celebs who rubbed elbows while jamming out to Yeezus' tracks.

Kandi Burruss and Porsha Stewart were all smiles while celebrating Phaedra Parks' birthday. Make sure to catch The Real Housewives of Atlanta ladies in an all new season November 3.

Candid snapshots are the best! How else would you capture the overjoyed emotion of Lena Dunham reuniting with her oldest pal?

Not to sound like a broken record, but we can't get enough of celebrity selfies—especially when they're from the beautiful Kelly Rowland!

Gwyneth Paltrow and Amanda de cadenet looked gorgeous all dolled up for the United Kingdom launch of Amanda's new website, The Conversation.

It was a rap royalty reunion on The Queen Latifah Show with guest stars LL Cool J and Darryl "D.M.C" McDaniels.

Molly Sims cozied up to Joey Maalouf, Rachel Bilson and Nicole Chavez at the Chloe show. According to Molly the fashion was "AH-mazing!!"

Nicky Hilton got artsy in Venice Beach while donning jean shorts, flats and a Lauren Moshi Sequin Skull Heart Sweater.

Busy Philipps channelled her inner Lady Gaga with a bow updo made out of her real hair!