Dame Vera Lynn beat The Beatles and other artists to top the British charts on Sunday, and become the oldest living singer to have a number one hit album, at the age of 92.
Lynn's album outsold recent chart toppers Arctic Monkeys and Jamie T, which reached number two, as the 70th anniversary earlier this month of the outbreak of World War II revived memories of her heyday.
"We'll Meet Again -- The Very Best Of Vera Lynn", a compilation of 24 of her best-loved recordings, has been rising through the charts, 70 years on since she recorded the title track.
Lynn was dubbed the "Forces' Sweetheart" during the 1939-1945 conflict, bolstering spirits with optimistic songs such as "We'll Meet Again", which struck a chord with soldiers heading to war and the families they left behind.
The album was released to coincide with the 70-year anniversary of Britain's declaration of war on Nazi Germany on September 3.
Lynn trumped The Beatles' 12 remastered editions, plus its box sets, released to great fanfare on Wednesday, and four of which are in the top 10.
"I'm so surprised, I can't quite believe it. It really is amazing that this has happened after all these years," she said.
Asked why the album had become popular again, Lynn told the BBC: "I think it's because of the problems that are going on in various parts, and a bit of nostalgia, but I don't know, I'd like somebody to tell me."
Gennaro Castaldo, from music store HMV, said the album had been growing consistently in popularity in recent weeks.
"It's a really lovely surprise, that nobody could have imagined a few weeks ago, and it's ironic that it's taken one revered British icon to block the historic return of another to the top of the charts," he said.
Her album features songs such as "(There'll Be Bluebirds Over) The White Cliffs Of Dover", and "Auf Wiederseh'n Sweetheart", which was a number one hit in the United States in 1952.
Lynn was born on March 20, 1917 in east London and her singing career was already flourishing when war broke out in 1939.