Lady Gaga's Frozen Weave and Taylor Swift's Girls Night Out: Top 12 Instagram Photos of the Week

Lady Gaga takes a plunge for charity and Alicia Keys introduces her newborn son in some of this week's best celebrity Instagram posts.

Shocking reveals and a star-studded girls night out make up this week's best-of-Instagram roundup.

See how Jared Leto, Taylor Swift and more celebrities spent their week in these photo highlights:

Jaime King names Taylor Swift godmother of her unborn second child.


And @taylorswift will forever be looking over our new baby @kyle_newman -we all love you!!!! Xx

A photo posted by Jaime King (@jaime_king) on

Jared Leto debuts his new platinum-blond hair.



A photo posted by JARED LETO (@jaredleto) on

Lady Gaga takes on Chicago's polar plunge for charity.

Lena Dunham and Kerry Washington share a moment on the set of Scandal.


Finally at liberty to reveal this pic of me on the #scandal set as "Kinky Sue" with my true ❤️ @kerrywashington

A photo posted by Lena Dunham (@lenadunham) on

Tayor Swift, Selena Gomez, Hailee Steinfeld, Jaime King, the Haim sisters, Sarah Hyland and Hayley Williams celebrate Fifth Harmony member Camila Cabello's 18th birthday.

Alicia Keys and Swizz Beatz unveil a family photo with their 2-month-old son.


Blessings and love!! #GenesisAliDean❤️

A photo posted by Alicia Keys (@aliciakeys) on

Britney Spears and Steven Tyler reunite at Spears' Las Vegas concert.


Look who decided to Walk This Way.... Thx for coming out to the show last night @IamStevenT! #PieceOfMe

A photo posted by Britney Spears (@britneyspears) on

Katy Perry takes a selfie in Munich, Germany.


OMG people been selfie-ing for centuries!

A photo posted by KATY PERRY (@katyperry) on

Empire's Taraji P. Henson and Jussie Smollett get a call from Terrence Howard.

Reese Witherspoon has a Forrest Gump moment.

Marlon Wayans snaps a photo with Joe Jonas, Ciara and the rest of the cast of NBC's new show I Can Do That!

Ansel Elgort spots his movie poster on the subway.