Stefani Joanne Angelina Germanotta, better known by her stage name Lady Gaga, is an American singer, songwriter and performance artist. Gaga is inspired by glam rockers such as David Bowie and Queen, as well as pop singers such as Madonna and Michael Jackson. She is also inspired by fashion, which she has said is an essential component to her songwriting and performances. To date she has sold over 20 million digital singles and more than four million albums worldwide.