Marianne Faithfull is recovering after breaking a bone in her back in an accident.
The 66-year-old, who famously dated Sir Mick Jagger in the 1960s, has had to cancel shows in Lebanon and the US as a result of her injuries.
Marianne, known for top 10 hits such as As Tears Go By, fractured her sacrum on the first day of a holiday in the US, following a visit to California for shows and a TV appearance.
Her injury happened last month but has only just come to light after she announced she was unable to perform and after four weeks in hospital has now returned to her home in Paris.
She said she was "sad" to have to cancel the performances and apologised for her no-show, but will also need to delay recording her next album.
In a letter to fans in Beirut, to explain the cancellation, she said: "I am so sad I won't be able to sing for you on Saturday.
"I broke my back in July and hoped and prayed I would be better enough to be able to do the performance on 17th August, although it's not very long, but my recovery was going well. Alas.
"I have never been to the Lebanon though I know it through books. It looks like one of the most beautiful places in the world."
She said she was longing to see Beirut and went on: "I still hope to be able to come one day not too far away when I'm completely healed and have my dream to sing in Beirut come true."
In addition to solo shows in New York and Chicago next month, she has also had to axe an appearance at a tribute to Edith Piaf in New York.