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Wow what a stir one dress can create! It seems Katy Perry's cleavage is fine for her music videos and Russell Brand, but not so much for the muppets on Sesame Street. The starlet's recent appearance on the kid's TV show has been pulled because it was deemed too provocative. Dressed in an acid-green bustier dress from Giles Deacon's Spring '10 collection, Katy sung a version of her hit song "Hot N Cold" to Elmo in the taped segment. Despite cutting Perry's sing-song from airing, Elmo has since confirmed that they'll be inviting her back.

"We'll have another one. Elmo loves Ms. Katy and we had a good time. So we'll have another play date," said Elmo. Nawwww!