Lynn Evans Mand, who was plucked from obscurity to become the lead singer of the Chordettes, performing with them during the height of their fame in the 1950s and ’60s on songs like the instantly recognizable hits “Mr. Sandman” and “Lollipop,” died on Feb. 6 at a care facility in Elyria, Ohio. She was 95.

Her grandson Robert Evans II said the cause was a stroke.

The Chordettes began in the 1940s in Sheboygan, Wis., as an all-woman barbershop quartet. They appeared regularly on Arthur Godfrey’s popular radio and television shows.

In 1953 Ms. Evans, as she was known at the time, was a case worker for the Red Cross and sang with an amateur barbershop quartet in Youngstown, Ohio. One day the Chordettes came through town for a performance, and Ms. Evans had a chance to sit in.

The members of the group were so impressed with her voice that when the time came to replace one of the original Chordettes, Dorothy Schwartz, who was leaving to have a child, Ms. Evans was asked to audition for the spot. She won it.