Ralph Saenz is the lead singer for glam metal parody band Metal Skool, who goes by the stage names "Michael Diamond" or "Michael Star." Metal Skool was formerly known as "Metal Shop" and were once featured in a Discover Card commercial as "Danger Kitty"; those older band names are currently used by unrelated parody bands, now. Ralph Saenz was the lead singer for L.A. Guns on the "Wasted" EP. He also sang for the bands 7% Solution, First Clause, Longgone, Nightfall, … Wikipedia
The definitive Wikipedia entry for Ralph Saenz. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Ralph_Saenz