Day 2, Python 3, 103 bytes
a=' sword'
b=a+','+a
c='side'
d=c+' to '+c
print(f"{d}, {c}, {d}\ndo you like my{b},{a} my diamond{b}")
Song so far:
side to side, side, side to side
do you like my sword, sword, sword my diamond sword, sword
Next line: Wo-o-o-o-o-o-oah, wo-o-o-o-o-o-oah from here