Jay Z and Eminem have teamed up for what Live Nation is calling the most sought after concert ticket ever. The high powered rap duo kicks off the four concert series tonight and tomorrow in Detroit, Em’s hometown. They will then travel to Jay’s hometown NYC for two shows at Yankee Stadium on Sept. 13 and 14. This concert is as prime time as it gets with Jay Z on top of his game having freshly toured this year and Eminem holding down the year’s best-selling rap album. Live Nation says it’s the heaviest ticket demand they have ever experienced.