Folk singer Mary Travers, a member of 1960s group Peter, Paul and Mary, is having chemotherapy for a form of leukaemia, her publicist has revealed.
Peter, Paul and Mary have cancelled a string of gigs next year
But she is expected to be in full remission soon, Ken Sunshine said.
"Mary looks forward to touring again with the trio soon, and is grateful for the well wishes that have come to her from all over the world," he said.
Peter, Paul and Mary had hits including Blowin' in the Wind and Puff, The Magic Dragon and are still working together.
They have cancelled five concerts in February and March 2005, but still have gigs scheduled for April and May.
With Peter Yarrow and Noel Paul Stookey, Travers was in one of the most successful US folk groups of the 1960s and early 70s.
Their hits also included If I Had a Hammer, Leaving on a Jet Plane and Tell It To The Mountain.
They have won five Grammy Awards and released a five-disc box set of their greatest hits, Carry It On, in February.