Disco queen Donna Summer died on Thursday of lung cancer, according to TMZ. She was 63.

TMZ sources told the website that the 1970s icon died in Florida after a long battle with lung cancer. In a statement of her death, the singer's family said, They are at peace celebrating her extraordinary life and her continued legacy. 

Sources said Summer had attempted to keep her illness hidden from fans. They told TMZ she was recently working on a new album.

Born LaDonna Adrian Gaines in Boston in 1948, the five-time Grammy winner is best known for her string of '70s hits, including I Feel Love and Bad Girls.

Her Grammy wins included Best R&B Vocal Performance (Female) for Last Dance and Best Rock Vocal Performance (Female) for Hot Stuff.

While working on the hit track, Heaven Knows, in 1978, Summer met Brooklyn Dreams vocalist Bruce Sudano. Within a few months, the two started dating and later married in 1980.  She is survived by her husband, three daughters and four grandchildren.