Lady Gaga rose to prominence with her debut album "The Fame". The American pop singer/songwriter is recognised by her flamboyant and diverse contribution to music through her fashion, performances and music videos. She is a unique artist with her own individual and idiosyncratic style. As of November 2013, she has sold an estimated 24 million albums and 125 million singles worldwide. Gaga has won five Grammy Awards and thirteen MTV Music Video Awards. Since she came to fame as an artist in 2008, she has had 11 top ten UK hit singles, four of which have reached number one. Outside of her musical career, she is a prominent LGBT activist. The pop star has also been involved in a gay rights campaign with the American Armed Forces. She has covered a wide variety of topics on her albums; "The Fame" focuses on the lust for stardom, "The Fame Monster" expresses fame's dark side through monster-metaphors and "Born This Way" uses controversial songwriting to tackle everyday themes. "ARTPOP" explores the relationship between art and pop and is a clever reference to the Pop Art of Andy Warhol.