We didn't make this a Song Of The Day when it first appeared a few months ago but with its UK physical release a few days away perhaps now is the time to pause and pay tribute to a song which unexpectedly appeared out of nowhere as a bonus track on a re-released album, turned out (even more unexpectedly) to be really quite good, and which has been in the UK Top 10 for about eight hundred years. Well done Rihanna, well done Chris Brown, well done whoever else has been involved in this quite pleasant single.