John Mayer is now back on Twitter after leaving in September 2010. Has it been that long? We'll after his girlfriend Katy Perry hit over 50 Million followers and is now the most followed person on Twitter, he decided to get back on to interact with his fans.
His fist tweet was "I'm back. What'd I miss? You can follow him @johnmayer. While you're there...follow me too @chrismichaels.