Ach du lieber, Rocky sings? Yep, and he'll likely be belting out the movie anthems 'Gonna Fly Now' and 'Eye of the Tiger' -- except in German. The boxing champ will hit the stage in an all-new musical that will debut first in Hamburg. Sylvester Stallone, along with world champion boxing brothers Wladimir and Vitali Klitschko, announced the project on Monday in Cologne, Germany. Said Stallone about the musical: "Rocky is a love story and he could never have reached the final bell without Adrian. To see this story coming to life on a musical stage makes me proud. And it would make Rocky proud."