You can pretty much count on any Will Ferrell late night talk show appearance to be a display of pure silly stupidity. For example this. He went on The Tonight Show last night to revive one of his stupider moments, the song "Tight Pants" this time bringing along Christina Aguilera. Maybe it's just me, but those pants look even tighter than the last time he did the bit.

As expected, the whole thing unraveled with Will launching into a screaming match against Jimmy Fallon for moving in on his lady.