Liam and Harry sweetly sing their ABCs, with Liam pausing before 'Z,' making Bert wonder if he forgot the lyrics. No worries, Liam knows his stuff, he just said he was waiting to see if the Sesame Street star would add something big to the ending.
Seems Bert was hoping for a really big finish but didn't get it. Yeah, we're kind of disappointed too, Bert.
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Gallery | One Direction and Disney Mash-Up