"No More Mr. Nice Guy" is a song by the hard rock singer Alice Cooper, taken from the 1973 album Billion Dollar Babies. The single reached #25 on the US charts and #10 on the UK charts, and helped Billion Dollar Babies to reach #1 in both the UK and the US. Michael Bruce and Alice Cooper wrote the song. Megadeth covered the song for the 1989 film Shocker. (wiki)