There are multiple ways to get GRRR! for your listening pleasure. There is a 50 track 3 CD option, a 4 CD super deluxe version with 80 tracks, and there is a vinyl box set featuring 50 tracks.
The number '50' stands out. The band is celebrating their 50th anniversary. Billboard reports that The Rolling Stones have revealed their plans for a celebration that will include 2 shows at London's O2 Arena and 2 shows in NYC, all in November!