The advertising campaign for the Citroen DS3 has caused a storm among John Lennon fans.
A television advert for the car features stars including Lennon and Marilyn Monroe talking about nostalgia.
During the advert - which was made with the Lennon estate's permission - Lennon says: “Why all this nostalgia? Start something new. Live your life now.”
But fans of the Beatle have reacted angrily, with some saying the advert is cashing in on the dead star's fame and calling for a boycott of Citroen products.
As a result, Lennon's son, Sean has moved to defend the decision by his mother Yoko Ono to let the footage be used. He did concede, however, taht he understood why people were "mad" at the advert.
Sean Ono Lennon said on his Twitter page: "She did not do it for money. Has to do w hoping to keep dad in public consciousness. No new LPs, so TV ad is exposure to young.
He added: "Look, TV ad was not for money. It's just hard to find new ways to keep dad in the new world. Not many things as effective as TV."