Jay-Z and Mary J. Blige will tour this spring in what will be one of the most potent urban music bills in recent memory. The "Heart of the City" outing begins March 22 in Miami.

And while a full itinerary is still coming together, the artists are confirmed to hit markets such as New Orleans, Houston, Las Vegas, Boston, Philadelphia and Los Angeles. Tickets go on sale Feb. 15.

Blige and Jay-Z have been close collaborators since 1996, when she appeared on his early hit "Can't Knock the Hustle."

Here are the initial Heart of the City tour dates:

March 22: Miami (American Airlines Arena)
March 26: Baltimore (1st Mariner Arena)
March 27: Uniondale, N.Y. (Nassau Coliseum)
March 28: East Rutherford, N.J. (Izod Center)
March 30: Philadelphia (Wachovia Center)
April 2: Toronto (Air Canada Centre)
April 3: Boston (TD Banknorth Garden)
April 5: Greensboro, N.C. (Greensboro Coliseum)
April 6: Washington, D.C. (Verizon Center)
April 16: Los Angeles (Hollywood Bowl)