It seems that Aerosmith's drummer is having heart problems. And because of those problems the band has been forced to cancel dates on thier current tour. The veteran rockers postponed a show in Concord, California last night (13.08.14) ''due to illness'' and it has now been claimed by gossip website TMZ that the 64-year-old musician - who has had heart problems in the past - is to undergo surgery for the unspecified complaint. "The Concord Pavilion announced the group were cancelling the show just hours before doors at the venue were due to open.They wrote on their Facebook page: ''Due to illness, Aerosmith has been forced to cancel tonight's performance at the Concord Pavilion in Concord, CA." And it looks like other dates will be canceled as well. "It is as yet unclear whether the 'Crazy' hitmakers will complete their current US tour, but according to TMZ, members of the crew have already been told the next gig, in Washington on Saturday (16.08.14), won't be going ahead."