Singer rumoured for role as assassin
Summer jaunt begins in Montreal on June 28
Nine-minute video proves huge internet hit
Singer's record label confirms new plans are afoot
'Ticket prices are fair' says Live Nation chief
Singer set for more 'Monster Ball' shows – ticket details
Plus Lady GaGa returns to albums chart summit
Fans vote both ways for 'Poker Face' star's outrageous dress sense
Singer makes 15 costume changes for spectacular stage show