BERLIN (Reuters) - Katy Perry, Sean Paul and Lana Del Ray dominated the stage of Germany's annual ECHO Music Awards in Berlin, where Adele picked up two awards to add to her string of BRIT and Grammy wins. The British star scooped Album of the Year for "21", as well as Best Female International Artist at Thursday evening's event, fending off competition from Lady Gaga and the late soul singer Amy Winehouse. German band Rammstein made wins on their home turf claiming Best Alternative Group and Best German Act Abroad. ...