Lady Gaga is an artist.
Stefani Joanne Angelina Germanotta ( [ ˈstɛfəniː_dʒɜrməˈnɒtə ] ; born March 28 , 1986 ) , known professionally as Lady Gaga , is an American singer , songwriter , and actress . In February 2017 , Gaga headlined the Super Bowl LI halftime show , which had over 150 million audience across various platforms worldwide , making it the most viewed musical event in history . With global album and single sales of 27 million and 146 million respectively , as of January 2016 , she is one of the best-selling musicians of all time . The Greatest is a television series broadcast on VH1 .