2015 is shaping up to be a world tour of beloved classic rock stars. The Rolling Stones are expected to announce a Milwaukee stop ... at some point. Ringo Starr is heading to the Riverside in October, the same month The Who will celebrate its 50th anniversary at the BMO Harris Bradley Center. Also celebrating 50 years of existence: Pink Floyd, hitting the Riverside stage Thursday and Friday night. Well, kind of - in the form of tribute band Brit Floyd.