Sierra Marie Swan (born April 5, 1978) is an American musician. She is known for her work with Dollshead, Black Eyed Peas and as a solo artist.
Swan is the daughter of 70's country and pop musician Billy Swan who played rhythm guitar for Kris Kristofferson. She was born in Los Angeles, California in April 1978. Swan's love with music started at an early age. During her many nights backstage while her father played, she decided to become a professional musician. As a teenager, Sierra listened to Prince, Queen, Oingo Boingo, The Beatles, Grant Lee Buffalo, Mozart and Patsy Cline. It was Patsy Cline who inspired her singing career. Swan also had influences from Tori Amos.