This guy is pretty good at impersonations.

[Ladios]

http://www.youtube.com/watch?v=n02OYgaHoWs&feature=related
Haven't actually seen "Americas Got Talent" ever so the ending kinda isn't that interesting for me. But oh well.

[Ad Bot]

[Vertzer]

That was pretty good, but this guy is my absolute favorite:
http://www.youtube.com/watch?v=8WQgwRnqZFQ&feature=related
http://www.youtube.com/watch?v=Dr4UVxfdOuc&feature=related