Lady Gaga

Stefani Joanne Angelina Germanotta

Stefani Joanne Angelina Germanotta (born March 28, 1986), known by her stage name Lady Gaga, is an American singer-songwriter, record producer, activist, businesswoman, fashion designer and actress.

Lady Gaga has a Mezzo-soprano vocal type.
Vocal range: 2.7 octaves (C3-B5)

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http://en.wikipedia.org/wiki/Lady_Gaga‎