Somebody has asked me to identify a song and the artist for them by some of the lyrics. I have no clue who sings the following:

"Melody danced her way right into my heart. Melody stole my heart and danced away. She had a man, the man's name was Sam. He used to drink, and he used to fight. He used to beat her almost every night. Melody, why did you stay?"

Does anybody recognize these lyrics?