Claim: Lady Gaga's complete name is Stefani Joanne Angelina Germanotta.
Evidence: Stefani Joanne Angelina Germanotta -LRB- -LSB- ˈstɛfəniː_dʒɜrməˈnɒtə -RSB- ; born March 28 , 1986 -RRB- , known professionally as Lady Gaga , is an American singer , songwriter , and actress.