Stefani Joanne Angelina Germanotta, known professionally as Lady Gaga, is an American singer, songwriter, and actress. Known for her image reinventions and versatility across the entertainment industry, she is an influential figure in popular music. With estimated sales of 124 million records, she is one of the best-selling music artists of all time. Publications such as Billboard and Rolling Stone have ranked her among the greatest artists in history.
After signing with Interscope Records in 2007, Gaga achieved global recognition with her debut album, The Fame (2008), and its reissue, The Fame Monster (2009). The project yielded a string of successful singles, including "Just Dance", "Poker Face", and "Bad Romance", which made her one of the few artists with at least three Diamond-certified songs in the US. Her second studio album, Born This Way (2011), explored electronic rock and techno-pop and sold 1.1 million copies first-week in the US. Its title track became the fastest-selling song on the iTunes Store, with over one million downloads in less than a week.