Lady Gaga, born Stefani Joanne Angelina Germanotta, is an American singer, songwriter, and actress. She is recognized for her frequent changes in style and her ability to work across different areas of entertainment. Her influence in popular music is widely acknowledged by critics and industry professionals. With an estimated 124 million records sold, Lady Gaga is among the most successful music artists worldwide. She has received recognition from major publications like Billboard and Rolling Stone, which have included her in their lists of the greatest artists in history.