Apparently Jay-Z wasn't too fond of Alicia Keys' first submission of her vocals for their collaborative track "Empire State Of Mind".  On an upcoming episode of VH1 Storytellers, which will air on November 12th at 11 p.m., Alicia detailed how she was congested when she initially recorded her vocals for the track, and after Jay heard it, he requested that she redo her part.  In the end it was worth the do-over, as "Empire State Of Mind" topped the charts on the Billboard Hot 100.

Source: xxlmag.com