Unfinished Business is the second collaboration album between R & B singer R. Kelly and rapper Jay-Z and was released Publishing worldwide on October 26 , 2004 .

`` Unfinished Business '' was promoted Cause_to_make_progress by the `` Best of Both Worlds '' concert tour with R. Kelly and Jay-Z performing songs from both their solo and joint albums .

`` Unfinished Business '' debuted Process_start at number one on the U.S. `` Billboard '' 200 chart amid controversy and criticism .

`` Unfinished Business '' was certified Check platinum by the Recording Industry Association of America ( RIAA ) on December 1 for selling more than 1,000,000 copies in the US .