Stefani Joanne Angelina Germanotta better known by her stage name Lady Gaga, is an American singer and songwriter. Born and raised in New York City.Lady Gaga came to prominence as a recording artist following the release of her debut album The Fame (2008), which was a critical and commercial success that topped charts around the world and included the international number-one singles "Just Dance" and "Poker Face". After embarking on the The Fame Ball Tour, she followed the album with The Fame Monster (2009), which spawned the worldwide hit singles "Bad Romance", "Telephone" and "Alejandro" and allowed her to embark on the eighteen-month long Monster Ball Tour, which later became one of the highest-grossing concert tours of all time. Her 2011 album Born This Way topped the charts of most major markets and generated more international chart-topping singles, which include "Born This Way", "Judas" and "The Edge of Glory". Beside her musical career, she involves herself with humanitarian causes and LGBT activism.Lady Gaga is recognized for her flamboyant, diverse and outré contributions to the music industry through fashion, performance and music videos. She has sold an estimated 23 million albums and 64 million singles worldwide, making herself one of the best-selling music artists of all time and her singles some of the best-selling worldwide. Her achievements include four Guinness World Records, five Grammy Awards and 13 MTV Video Music Awards.