Jay-Z and Eminem’s four concert dates this month have just added an opening act to the bill. Today it was announced that B.o.B. will be warming the crowd up in both New York and Detroit.

Bobby Ray’s manager has confirmed with XXLMag.com that the Freshman alum will grace the stage at both Detroit’s Comerica Park and New York’s Yankee Stadium. The shows in Em’s hometown will go down tomorrow (September 2) and Friday (September 3). After a little less than two weeks off, the three will head to Jay’s backyard to perform on September 13 and 14.

As previously reported, both B.o.B. and Eminem were in the Billboard Top 200 this week. Em's Recovery landed at the No. 3 spot, while The Adventures of Bobby Ray picked up the No. 39 slot.—Adam Fleischer