She's f*ing Matt Damon

Two videos that you must see.

A little backround if I may... Jimmy Kimmel and Matt Damon have this on going "fued" that is more of an on going joke. Kimmel ends his show each night with something along the lines of "Apologies to Matt Damon, we've run out of time again..."
So Matt Damon got together with Sarah Silverman (Kimmel's long time girlfriend and comedian) and made this little video...
Personally, I love how excited Sarah looks as she sings... I mean, who wouldn't be thrilled about that? Matt does look mighty hot. Then Jimmy Kimmel responded last night...

Both videos are hysterical and Jimmy's features some major A-listers... can you spot them all??