Before Alan O'Day became a successful recording artist, he was writing hits for other singers. First there was "The Drum" in 1971 for teen idol Bobby Sherman, which was featured on his Portrait of Bobby album. "Angie Baby" for mellow Australian crooner Helen Reddy followed in 1974 on her Free and Easy album, and the single hit the top of the charts late that year. Three years later, O'Day stepped in front of the microphone and took "Undercover Angel," another song he penned, into the winner's circle. The single sold a couple of million copies in 1977 for Pacific Records. O'Day...