Today on Twitter, Slash informed his fans that he was packing up for a secret gig at a concert in London. In addition, Twisted Sister's Dee Snider tweeted that he spoke with Mountain's Leslie West, who is recovering from his recent leg amputation. And Jane's Addiction's Perry Farrell offered several tweets about his encounter with Doors drummer John Densmore. See what classic rockers are up to today in the list of tweets below: