One thing about modern music is that band lineups can change in a heartbeat. Just weeks after we thought Steven Tyler would never play with Aerosmith again, he’s reunited with the Boston legends to headline two festivals.

Man, this Aerosmith saga just keeps on unfolding, and it’s getting both more and more interesting and ridiculous. Since lead vocalist Steven Tyler went off to rehab, tensions have been mounting between him and the rest of the band, to the point where the band was looking for a temporary replacement. Tyler responded to his band’s decision with a simple statement: he is Aerosmith.

So what’s Steven Tyler been up to since his entry in rehab? He’s been relaxing… in bars. Not only has he been spending his free time in classy establishments like the Tilted Kilt, but he’s been singing his own songs on their karaoke night!

Some say the recently unpredictable weather is a sign that 2012 marks the end of humanity. Now, I’m not sure that the weather can warn us of an impending apocalypse, but I can think of one thing that can; rock legends Aerosmith are on the hunt for a new lead vocalist.

Another day, another rockstar recovering (or at least making a publicized attempt at it). Steven Tyler, lead singer of seminal arena rock group Aerosmith, has entered rehab for an addiction to painkillers, which he alleges to be taking to cope with years of performance-related injuries.