Bruno Mars & Lady Gaga have entered the Top 10, can their passionate duet get them to reign as No. 1? ►► Subscribe for more music news: http://blbrd.cm/Proracf ►► See our latest videos: http://blbrd.cm/xOgw6VQ About: Billboard is the world's most influential music media brand, with an unmatched authority among artists, fans and the industry. Billboard powers the ultimate global music destination and magazine, featuring unrivaled reporting on music news, issues and trends, the industry’s

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