Frankie Muniz:

Domo Arigato, Mr. Roboto!

1/15/2008 2:19 PM PST BY TMZ STAFF
It's always fun to dance like no one's watching -- too bad for Frankie Muniz, someone was.

Frankie couldn't contain his excitement after getting a kiss from fiancee Jamie Gandy -- and expressed it in this robotic dance!