I heard this knock knock joke from The Ellen Degeneres Show. Ellen was interviewing Neil Patrick Harris. He is actually a famous actor. He was telling Ellen about his kids that they loved knock knock joke. He told Ellen the knock knock joke his kids made. It began with his daughter said "Knock Knock?" Neil said "Who's that?" The daughter said "Nicole" Neil said "Nicole who?" His daughter said "Nicole never bothered me anyway" That was actually fun and creative way to adapt from Disney Frozen song.
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