Many were hesitant to pay $30 for the latest hip-hop extravaganza at Congress Theater on Saturday night, headlined by Doom and Mos Def. The reason? Doom, the masked rapper who's been delivering deadpan punch-lines under various monikers since the '90s, has been known to send an impostor to perform in his place, a stunt that some call genius (his act is all about hidden identity, anyway) and some call insulting.

So, who really showed up this weekend? The debate rages on at local hip-hop blog Fake Shore Drive.