how is singing a part of the posadas tradition
Las Posadas Individuals may actually play the various parts of Mary (María) and Joseph with the expectant mother riding a real donkey (burro), with attendants such as angels and shepherds acquired along the way, or the pilgrims may carry images of the holy personages instead. Children may carry poinsettias.[12] The procession will be followed by musicians, with the entire procession singing posadas such as pedir posada.[4] At the end of each night's journey, there will be Christmas carols (villancicos), children will break open star-shaped piñatas to obtain candy and fruit hidden inside, and there will be a feast.[4][13] Piñatas are traditionally made out of clay. It is expected to meet all the invitees in a previous procession.
Bole So Nihal Bole So Nihal...Sat Sri Akal is the Sikh slogan or jaikara (lit. shout of victory, triumph or exultation) which means one will be blessed eternally who says that God is the ultimate truth.[2] Besides being a popular mode of expressing ebullient religious fervour or a mood of joy and celebration, it is an integral part of Sikh liturgy and is shouted at the end of ardas, Sikh prayer and said in sangat or holy congregation. The jaikara expresses the Sikh belief that all victory (jaya or jai) belongs to God, Waheguru, a belief that is also expressed in the Sikh salutation "Waheguru ji ka Khalsa, Waheguru ji ki Fateh" ("Khalsa is of God and to God belongs the victory", or "Hail the Guru’s Khalsa! Hail the Guru’s victory!")