"The shows last year were just too overwhelming (not to do it again)... You get antsy when you're not on the road after 50 years..." Veteran rocker Keith Richards couldn't wait to get back onstage after celebrating The Rolling Stones' 50th anniversary with a set of reunion gigs last year (12). The band recently announced a new run of concerts for North America and the U.K., which will kick off in May (13).