Stefani Joanne Angelina Germanotta, better known by her stage name Lady Gaga, is an American singer, songwriter, and actress. She is known for her self-empowering messages, fashion, and live performances including playing acoustic piano versions of her songs. Vocally, Gaga possesses the range of a contralto and exhibits "overwhelming expression, instinctive vocal phrasing, '80s rock reminiscent chest belts and animalistic vocal ticks" while being able to move through 3 octaves. Her music style has been described as electropop and as dance-pop and the structure of her music is said to be influenced by classic 1980s pop and 1990s Europop. The singer was influenced by flamboyant glam rockers such as Freddie Mercury and she took her stage name from the Queen popular song "Radio Ga Ga".