SON OF A GUN Steven Adler announces another new singer, this guy from a Guns N’ Roses tribute band     Instagram — Was it an April Fools or did it just go sideways that fast? Back in April former Guns N’ Roses drummer Steven Adler announced his new singer. Adler chose former American Idol contestant Constantine Maroulis, and bragged about how great he was. Then Adler’s Appetite did a few Hollywood shows and they were off to Australia in May.[…]