Mary Travers, of folk singing group Peter, Paul & Mary fame, died at the age of 72 back in mid-September. The NY Times now reports that a memorial celebration of her life and music will be held at 7 p.m. this coming Monday at Riverside Church in Morningside Heights. "The service will be open to the public. Tickets will be available on the day of the event on a first-come-first-served basis. Half the seats will be reserved for invited guests," and everyone from Pete Seeger to Whoopi Goldberg is expected to show.