6.
Demi Lovato uploaded a selfie:
7.
MIley Cyrus tried on a wig:
8.
Lea Michele met her puppet self:
9.
Nicole Richie looked out a big window:
10.
Ryan Seacrest posed with Lady Gaga:
11.
And so did Andy Cohen:
12.
Katy Perry kissed a crab:
13.
The Rock showed off his buff bod:
14.
Brody Jenner held a koala:
15.
And Emma Roberts held an Alligator:
16.
Amanda Seyfried kissed her dog:
17.
And Lena Dunham had a "Mary" moment: