If you haven't heard you'll hear it hear Rihanna and Eminem are set to be coheadlining a tour set to kick off this coming August. The Duo will be starting their "Monster" tour off in Los Angeles August 7 at the Rose Bowl followed by shows at the MetLife stadium in NYC on August 16 and then at Comerica Park in Detroit August 22. American Express pre sale tickets are now available on ticket master.
http://m.ticketmaster.com/ticket/search.do?articles=tmus&query=rihanna&submit=
http://m.ticketmaster.com/ticket/search.do?articles=tmus&query=rihanna&submit=