Katy Perry's Sharks and a 'Full House' Reunion: Top 12 Instagram Photos of the Week

THR_instagreatest - H 2015

THR_instagreatest - H 2015

John Legend and Chrissy Teigen dance with Katy Perry's sharks and Gwen Stefani meets Michael Keaton in some of this week's best celebrity Instagram posts.

Old friends reunite and music collabs are teased in this week's best-of-Instagram roundup.

See how Lady Gaga, Reese Witherspoon and more celebrities spent their week in these photo highlights:

Chrissy Teigen and John Legend dance with Katy Perry’s sharks.



A photo posted by @chrissyteigen on

Eric Stonestreet gets caught in the middle of a Full House sandwich by John Stamos and Bob Saget.


Full(er) House.

A photo posted by Eric Stonestreet (@ericstonestreet) on

Snoop Dogg and family celebrate his son’s football recruitment to UCLA.


G paw dirty dell n bigg dogg??

A photo posted by snoopdogg (@snoopdogg) on

Lady Gaga rehearses with Paul McCartney.

Reese Witherspoon poses with fellow best actress nominees Marion Cotillard, Julianne Moore, Rosamund Pike and Felicity Jones in front of Oscar.


Honored to be in these ladies' company yesterday! #OurFacesSayItAll #Oscars #Oscarslunch @theacademy

A photo posted by Reese Witherspoon (@reesewitherspoon) on

Taylor Swift dances in front of her own exhibit at the Grammy Museum.


Went to the Grammy Museum in LA to see the exhibit they did on ma life. My behavior was as embarrassing as usual.

A video posted by Taylor Swift (@taylorswift) on

Gwen Stefani meets Michael Keaton on the set of The Tonight Show.


So great meeting Michael Keaton at The Tonight Show! Such a fan! Tune into @FallonTonight this evening!

A photo posted by Gwen Stefani (@gwenstefani) on

Jamie Foxx teases new music with Lenny Kravitz.


Music on the way

A photo posted by Jamie Foxx (@iamjamiefoxx) on

Katy Perry gets the letters "XLIX" tatted on her finger in commemoration of her Super Bowl halftime show.

Kim Kardashian, Kanye West, John Legend and Chrissy Teigen double date at Waffle House.


Double date at the Waffle House

A photo posted by Kim Kardashian West (@kimkardashian) on

Justin Timberlake confirms that wife Jessica Biel is pregnant.

Steven Tyler and Britney Spears reenact their 2001 Super Bowl halftime performance at the Super Bowl XLIX.



A photo posted by Steven Tyler (@iamstevent) on