Why are we singing??????

While at church this morning, we were all standing singing a hymn as is pretty standard for our morning church service.  All of a sudden I feel a tap, tap, tap on my arm.  So I lean down and Gabby whispers in my ear, "Who are those people up there?"  I look up and realize she is pointing at the choir.  So I lean back down and whisper to her, "That is the choir."  I stand back up and continue singing.  A few seconds goes by and I feel another tap, tap, tap on my arm.  I bend down once again and Gabby whispers, "Then why are WE singing?"