Duo perform 'Walk This Way' together at a Perry solo gig
But the drummer refuses to deny singer has left the band
Guitarist says band 'will probably find somebody else to sing'
Band due to hold crisis talks about their future
Guitarist says band are just 'Taking a breather' and a new album 'Will happen'
Band cancelled their US tour after frontman Tyler fell offstage
Plus guitarist Joe Perry pays tribute to Les Paul
Frontman Steven Tyler is recovering from stage fall<br />
Band cancels gig in wake of Steven Tyler's accident<br />
Frontman slips offstage during South Dakota show