In this publicity image released by Sesame Workshop, singer Katy Perry, left, is shown with Elmo performing in a music video called "Hot and Cold" about opposites on "Sesame Street." (AP Photo/Sesame Workshop)
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In this publicity image released by Sesame Workshop, singer Katy Perry, left, is shown with Elmo performing in a music video called "Hot and Cold" about opposites on "Sesame Street." (AP Photo/Sesame Workshop)
