Oh why should any heart be filled with sadness? We should be gay! Oh my, the world should be all filled with gladness In every way! A song can make most anybody happy, So let us sing; My song is full of life and good and snappy, It's got the swing! Join the chorus, Now's the time to start, Sing the chorus With a happy heart. Tra-la-la-la-la-la-la-la-la-la, Do your little part, Tra-la-la-la-la-la-la! Oh how can anybody keep from dancing When songs they play? And how can anybody keep from prancing, We should be gay! I claim the way to loosen up your feelings Is sing and shout! I'm thrilled all melodies are so appealing, I dance about! Join the chorus, Now's the time to start, Sing the chorus With a happy heart. Tra-la-la-la-la-la-la-la-la-la, With a happy heart, Tra-la-la-la-la-la-la!