Cooper struggled to contain his giggles at Oteri reprising her Saturday Night Live impression as Walters, repeatedly saying "This is 20/20" as the former co-anchor of ABC News' 20/20.
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TOPICS: Anderson Cooper, ABC, CNN, Dick Clark's New Year's Rockin' Eve with Ryan Seacrest, New Year's Eve Live with Anderson Cooper & Andy Cohen, Alanis Morissette, Barbara Walters, Cheri Oteri, Don Lemon, Holiday Programming, New Year's Programming