Alan Earle O'Day (October 3, 1940 – May 17, 2013) was an American singer-songwriter, best known for writing and singing "Undercover Angel," a million-selling Gold-certified American No. 1 hit in 1977. He also wrote songs for many other notable performers, such as 1974's Helen Reddy No. 1 hit "Angie Baby" and "Rock and Roll Heaven" (originally by Climax and made famous by the Righteous Brothers). In the 1980s he moved from pop music to television, co-writing nearly 100 songs for... [more on Wikipedia]