Lyrics:
Happy happy oh my friendBlow out candles once againLeave the presents all insideTake my hand and let's take a rideBackwards down the number lineYou were eight and I was nineDo you know what happened thenDo you know why we're still friendsLaughing all these many yearsWe've pushed through hardships tasted tearsWe made a promise one to keepI can still recite it in my sleepEvery time a birthday comesCall your friend and sing a songOr whisper it in to his earsOr write it down just don't miss a yearYou decide what it containsHow long it goesBut this remainsThe only rule is it beginsHappy happy oh my friendYou decide what it containsHow long it goesBut this remainsThe only rule is it beginsAnd all my friends comeBackwards down the number lineAll my friends comeBackwards down the number lineAll my friends comeBackwards down the number lineAll my friendsYou decide what it containsHow long it goesBut this remainsThe only rule is it beginsHappy happy oh my friendYou decide what it containsHow long it goesBut this remainsThe only rule is it beginsAnd all my friends comeBackwards down the number line