09-15-2010, 08:40 AM
Personally, I wouldn't use any recent singers as influential; certainly not the likes of Katy Perry, Lady Gaga or Rhianna. And certainly not, with the possible exception of Lady Gaga, musicians. They are more likely influenced by singers themselves; like Madonna obviously influenced Lady Gaga.
I'd state Alice Cooper and Kiss as influential musicians. Both have caused so many people to get into music, such as Marilyn Manson. Ace Frehley who used to play guitar in Kiss and is to many the definative Kiss guitarist, caused many people to pick up a guitar for the first time.