(Patti) LaBelle - Lady Marmalade (1975) HD 0815007

Singer Sarah Dash, a co-founder of trailblazing US group Labelle, who had a huge hit with Lady Marmalade, has died at the age of 76.

Fellow group member Patti LaBelle confirmed the news on Twitter, saying she was "heartbroken" but that Dash's spirit would "live on".

"We were just on stage together on Saturday and it was such a powerful and special moment," she posted.

Lady Marmalade went to number one on the US Billboard chart in 1975.