I've been debating with my brothers that Frank Oz is no longer doing his famous characters. In the Weezer video it is obvious that Mr. Oz is not doing Fozzie, but it's hard to say if he is or isn't doing Piggy (I say he isn't) and on Sesame Street as of late, I can clearly tell that Frank Oz isn't doing Cookie, Bert and Grover in new segments, although at times I think Mr. Oz is performing Cookie and Grover (the cookie/postal sketch). Can anyone clear this up for me?