Channeling Garth: Pearl's Garth Brooks will perform his first-ever concert at Nashville's Ryman Auditorium, an invitation-only show airing live Sept. 8 on SiriusXM to launch The Garth Channel. "Just the thought of playing the Ryman is crazy," says Garth. "The fact that SiriusXM is going to capture the evening makes it even a bigger event for me." SiriusXM subscribers who have had an account since July 11 will have the opportunity to enter to win tickets to the Ryman show beginning today (7/27) by a radio call-in opportunity (info here); and beginning tomorrow (7/28) by online entry (here).