Mark Ronson and his new bride Josephine De La Baume offered a toast at their wedding to the late Amy Winehouse, who was friends with both of them, according to a source who attended the event.

The source told Us Weekly, "Amy was a great friend of both Mark and Josephine and they would have been thrilled to have her with them at their big day, but sadly it wasn't to be."

Ronson produced Winehouse's breakthrough album 'Back to Black.' The source believes the singer would have attended the wedding and even performed: "Amy would definitely have sung one of her hits at the wedding if she were still alive, as she meant to much to both of them. Her death devastated the pair of them."

Ronson and de la Baume married on Saturday, Sept. 3 in France. Kate Moss and Lily Allen were among those who attended the ceremony. The source was impressed by the wedding and the couple's long-term prospects: "It's clearly true love. There was a great deal of planning involved – especially to get celebrity friends in at such short notice, but it all worked extremely well."

Since her death, Winehouse has remained in the spotlight, with a tribute at the VMAs and a soon-to-be-released duet with Tony Bennett. Ronson himself honored Winehouse in July.