She's one of those people who can be really funny when she's being dirty and offensive (in a humorous way), but when she can't be dirty (i. e., when she tries to keep it clean enough for network TV), she just doesn't know how to be funny that way.
I honestly never find americans to be funny at all. There's a few exceptions but that the general feeling. Big words don't belong in humour. Trying to keep your jokes pc is a fail as well. Rambling sentences in a jokes a killer too. The best ones are off the cuff, simple and fukin offensive. Somebodies got to be the victim, especially at these stuffy award ceremonies. Ricky Gervais is usually a cheeky, fat little fucker but he nailed it at the golden globes