Complex sentence: He first fronted the rock band Data Clan, which became Love/Hate, and has also sung for L.A. Guns, Ratt, Adler's Appetite and other lesser known acts.
Split into simpler sentences: He first fronted the band Data Clan, which evolved into became Love/Hate. Pearl has also sung for L.A. Guns, Ratt, Adler's Appetite, and other, lesser known acts.