Can you help me figure out the song (Target Commercial)?

omomgomgogmgom! i love that commercial!!! i saw it for the first time last night! i cant remember alll of it but i know at the end its like "fa-la-la-la-la ho-ho-ho" omg its so funny though! ahhhh! if you find the lyrics pleaseee! post them on here! xDXd thanks