Kat Graham's 'Monsters Inc.' Costume Is So Good!

We love the movie Monsters Inc. so much that we are totally obsessed with the costume Kat Graham wore to the 2015 Just Jared Halloween Party on Saturday (October 31) at No Vacancy in Hollywood.

The 26-year-old actress and singer was totally incognito in the Mike Wazowski costume, which she removed for a few photos.

PHOTOS: Check out the latest pics of Kat Graham

Other stars in attendance at the event that night included AnnaLynne McCord, who shared a cute video on her Instagram account that day. Watch the clip below!