Right, I am definitely a huge Frozen fan. This Let It Go lip sync clip done by parents is hilarious--they really are into the song while the daughter isn't interested at all. I love their facial expressions while singing the song.

Below, is another cover, sang by various characters of Disney's and Pixar's which appeared to be from one person. It's super cool that this guy could make about everybody's voices in one song (how could he remember all the characters in such timing?)
Worth to watch indeed!