Lady Gaga's Chicken Farm and Anna Kendrick's Mud Play: Top 10 Instagram Photos of the Week

Justin Bieber faces off with Derek Zoolander and Anna Kendrink gets her hands dirty in some of this week's best celebrity Instagram posts.

Co-stars get close and old friends get nostalgic and in this week's best-of-Instagram roundup.

See how Hilary Duff, Jaime King and other celebrities spent their week in these photo highlights:

Lady Gaga fetches eggs from her chicken coop.


4 eggs!

A photo posted by @ladygaga on

Katy Perry satisfies her late-night cravings in Tokyo at Taco Bell.

Hilary Duff reunites with her Lizzie McGuire co-stars at a bowling alley.


So this happened last night... #LizzieMcGuire

A photo posted by Jake Thomas (@sirjakethomas) on

Anna Kendrick gets down and dirty with Pitch Perfect 2 co-star Brittany Snow.


Don't be afraid to get your hands dirty.

A photo posted by Anna Kendrick (@annakendrick47) on

Jaime King strips down to her Calvins.

Justin Bieber teases his best Blue Steel for his role in Zoolander 2.


@benstiller #Zoolander2 #itsawignotmynewhair

A photo posted by Justin Bieber (@justinbieber) on

Josh Gad reunites with Frozen songwriters Robert Lopez and Kristen Anderson-Lopez on the set of The Comedians.

Ariel Winter attends her high school prom.


Shmoopberry and I take prom #prom #prom2015

A photo posted by Ariel Winter (@arielwinter) on

Taylor Swift, Haim, Lorde, Halston Sage and Empire's Serayah McNeill have an all-girls get-together. 


Real love. @serayah @haimtheband @lordemusic @halstonsage

A photo posted by Taylor Swift (@taylorswift) on

Anderson Cooper meets the "Mom of the Year," Toya Graham.