D5 G5 C5 E5 D5 G5 D5 C5 G5 Who's that knocking D5 At my door? G5 Let's go out and C5 Let's explore G5 D5 Come and have E5 C5 Some fun with me G5 D5 You know there's always E5 C5 D5 So much more to see G5 Knock, knock, knock! (Knock, knock, knock!) D5 Who can it be? E5 Is that you? C5 Yes it's me G5 Knock, knock, knock! (Knock, knock, knock!) D5 Who can it be? E5 Is that you? C5 Yes it's me G5 D5 C5 G5 Who's that tapping out D5 A beat today? G5 Makes me want to C5 Jump and sway G5 D5 Come and see E5 C5 The world with me G5 D5 E5 C5 D5 Together we will be so ha-hap-py! G5 Knock, knock, knock! (Knock, knock, knock!) D5 Who can it be? E5 Is that you? C5 Yes it's me G5 Knock, knock, knock! (Knock, knock, knock!) D5 Who can it be? E5 Is that you? C5 G5 Yes it's me D5 I'm knock, knock, knocking at your door (Knock, knock, knock!...Knock, knock, knock!) I'm knock, knock, knocking on the floor (Knock, knock, knock!...Knock, knock, knock!) Come on out and play with me today G5 Knock, knock, knock! (Knock, knock, knock!) D5 Who can it be? E5 Is that you? C5 Yes it's me G5 Knock, knock, knock! (Knock, knock, knock!) D5 Who can it be? E5 Is that you? C5 G5 Yes it's me