Unintentionally funny lipsynching scenes
 

I don't know what forum to put this in, but I think this thread is long overdue. This is for lipsynching in TV or movies that don't seem to intend to be funny but turn out that way.
My nominees
Tori Spelling in the Glee Club in Saved by the Bell
Marty McFly in Back to the Future
Milli Vanilli in their Behind the Music, VH1s finest hour

Renee Zellweger in Bridget Jones's Diary, when lipsynching "All By Myself" in her room.

Macaulay Culkin in Home Alone, when lipsynching "White Christmas" in front of bathroom mirror.

Cameron Diaz in My Best Friend's Wedding, when lipsynching .. er .. "I Just Don't Know What To Do With Myself" (??) .. in the karaoke.