Rapper Eminem performs at Yankee Stadium, Monday, Sept. (Credit: AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium, Monday, Sept. 13, 2010, in New York. (AP Photo/Jason DeCrow)

Jay-Z and Eminem perform at Yankee Stadium

Jay-Z and Eminem perform at Yankee Stadium, Monday, Sept. 13, 2010.

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

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Jay-Z performs during the first concert at the
(Credit: AP )

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

Jay-Z performs during the first concert at the
(Credit: AP)

Jay-Z performs during the first concert at the new Yankee Stadium. (Sept. 13, 2010)

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Kanye West makes a guest appearance during a
(Credit: AP)

Kanye West makes a guest appearance during a Jay-Z concert at Yankee Stadium. (Sept. 13, 2010)

Kanye West, left, makes a guest appearance as
(Credit: AP)

Kanye West, left, makes a guest appearance as Jay-Z performs during a concert at Yankee Stadium. (Sept. 13, 2010)

Kanye West (left) makes a guest appearance as
(Credit: AP )

Kanye West (left) makes a guest appearance as Jay Z performs during a concert at Yankee Stadium, on Sept. 13, 2010.

Kanye West makes a guest appearance during a
(Credit: AP )

Kanye West makes a guest appearance during a Jay-Z concert at Yankee Stadium. (Sept. 13, 2010)

Kanye West, right, makes a guest appearance as
(Credit: AP )

Kanye West, right, makes a guest appearance as Jay-Z performs during a concert at Yankee Stadium. (Sept. 13, 2010)

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Kanye West, left, and Jay-Z perform during a
(Credit: AP)

Kanye West, left, and Jay-Z perform during a concert at Yankee Stadium. (Sept. 13, 2010)

Rapper Eminem performs at Yankee Stadium Monday, Sept.
(Credit: AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010 in New York. (AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium. (Sept. 13,
(Credit: AP)

Rapper Eminem performs at Yankee Stadium. (Sept. 13, 2010)

Rapper Eminem performs at Yankee Stadium. (Sept. 13,
(Credit: AP)

Rapper Eminem performs at Yankee Stadium. (Sept. 13, 2010)

Rapper Eminem performs at Yankee Stadium Monday, Sept.
(Credit: AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010 in New York. (AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium, Monday, Sept.
(Credit: AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium, Monday, Sept. 13, 2010, in New York. (AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium Monday, Sept.
(Credit: AP Photo/Jason DeCrow)

Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010 in New York. (AP Photo/Jason DeCrow)