Lady Gaga, Eminem, Katy Perry: Whose New Male

BillboardLady Gaga, Eminem, Katy Perry: Whose New Male-Female Duet Is Best?BillboardMusic fans are in the thick of 2013's blockbuster fall release schedule, with new offerings from Eminem and Lady Gaga on their way and Katy Perry's latest full-length recently hitting retailers. All three superstars have recently released absorbing new ...