After a cursed first album together, where Best of Both Worlds (2002) was swallowed up by a sex scandal, you'd think R. Kelly and Jay-Z would have finished business together. As Kelly faced child pornography charges, Jigga ran as far away as he could from his duet partner (and straight into the arms of Beyonce Knowles and then retirement).

So who wanted a second round? This time, it's ended in total disaster. A 40-city American tour that was riddled with arguments, technical faults, lighting problems, tales of sabotage, violence, guns and even a pepper-spray incident has resulted in Kelly filing a US$75 million lawsuit against Jay-Z and their tour promoter.

How did such a great idea - the industry's best R&B singer jams

with the best rapper in the game - go so wrong?

For starters, the energy is bad. Or, not even present. This album is like a precursor to the pair's controversial split. While both guys play their roles well, and we're sure Kelly can croon any woman into bed and Jigga dreams in rhyme, there is an overriding feeling that combines disinterest with lethargy and apathy.

Did they even meet up or bother to get out of bed to make this album?

The 11 tracks on Unfinished Business just play out their time and spin off into nowhere-land.