Question: "I Was a Fool" is a song written and performed by Canadian duo Tegan and Sara, inspired by one of Rihanna's singles ,Unfaithful from her second studio album "A Girl like Me" (2006), written by who?
Sentence (from "Unfaithful (song)"): Originally titled "Murderer", the single speaks about a woman who regrets cheating on her partner.
Relevant evidence: No