What sets the just-released Rolling Stones hits collection, GRRR!, apart from the other best-of albums they've put out is that it contains two new songs. Mick Jagger chipped in with "Doom and Gloom," and Keith Richards added "One More Shot," both of which are new songs -- not ones that have been sitting around for years.

Jagger says he wrote 'Doom and Gloom' a few months ago and felt it would be good for the Stones:

After a few days in New York, Jagger and the Stones will start rehearsing in London for their two shows at the O2 Arena there this month.