Entertainment Jay-Z & Eminem at Yankee Stadium September 14, 2010 / 12:00 PM EDT / CBS News AP Photo/Jason DeCrow Kanye West, left, makes a guest appearance as Jay-Z performs during a concert at Yankee Stadium, Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Jay-Z performs during a concert at Yankee Stadium, Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Jay-Z performs during a concert at Yankee Stadium, Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Kanye West makes a guest appearance during a Jay-Z concert at Yankee Stadium, Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010, New York. AP Photo/Jason DeCrow Rapper Eminem performs at Yankee Stadium Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Kanye West, left, makes a guest appearance as Jay-Z performs during a concert at Yankee Stadium, Monday, Sept. 13, 2010, in New York. AP Photo/Jason DeCrow Jay-Z performs during a concert at Yankee Stadium, Monday, Sept. 13, 2010, in New York.