Lyrical Confusion

so, bean and i are at her cousins' house. we are talking and the girls are dancing to christmas music in the kitchen. the wassail song comes on... you know the one that says "love and joy come to you and to you your wassail too..." yeah that one. well, if you are 4 you might not hear those words exactly. you might hear something more like this "..... and show your muscles too". seriously. that is what my sister and i heard my niece singing! then she says to bean, "you need to show your muscle! like this!". and we turn to find her flexing her bicep. ha! imagine three little girls running around a kitchen island and showing their muscles for christmas. yeah, it was that good! ;)