Singer performs track as part of 'We Are Glamily' tour
Singer posts short video clip and claims it's a 'preview'
Singer performs album collaboration track 'Shady'
Duo performed cover at charity event last year
Star says he should stop 'fanning the flames'
Actor Russell Crowe agrees with Lambert's claims
Gigwise readers name rescheduled Sonisphere gigs as the year's best
The American Idol star appeared on Home for the Holidays event