5. The Rolling Stones
The Rolling Stones haven't played a concert since the summer of 2007, and the publiciation of Keith Richards' tell-all book Life didn't exactly make Mick want to launch a big tour with him – but rumors have been swirling forever that they're going to tour this year in celebration of their 50th anniversary. Most members of the band are on record saying they hope it happens, but it's ultimately going to be Mick Jagger's decision. The group reportedly jammed together in December, and even brought Bill Wyman back to the fold. We're all praying they wind up hitting the road. Stay tuned.