Lady Gaga stuns with 'Sound of Music' tribute at Oscars

Lady Gaga - G.U.Y.

Lady Gaga becomes first artist to sell over 20 million digital singles

Lady Gaga set to receive another award for 'House of Gucci'

Lady Gaga Now Has Her Very Own Life-Size Dolls—Check 'Em Out!

Lady Gaga Gets New Puppy 3 Years After Dognapping Case

Lady Gaga's most iconic looks

Lady Gaga talks about her ever-changing fashion