Pete Doherty, the English co-frontman of the Libertines, has shared a new song called "Flags of the Old Regime." An official description of the song says it "was written by Peter about and as a tribute to his friend Amy Winehouse." This July will mark four years since Winehouse died at the age of 27.

The "Flags of the Old Regime" single will see an official release on March 9 through Walk Tall Recordings. All proceeds will go to the Amy Winehouse Foundation, which "works to prevent the effects of drug and alcohol misuse on young people," according to its website. "We also aim to support, inform and inspire vulnerable and disadvantaged young people to help them reach their full potential."

The song itself is a sorrowful acoustic track with gentle strings and subtle keyboards. The winding, somewhat cryptic lyrics contain the line, "I don't wanna die anymore / Any more than I did wanna die before."

Aside from their friendship, Doherty and Winehouse were once romantically involved. "This is difficult for me to admit. But, yes, it's true. Amy and I were lovers," Doherty told the Daily Mail in 2012. "I loved her then and, well, I still do today. But towards the end, as only lovers can, she became quite mean and cruel to me. She didn’t suffer fools…and believe me, she had a mean right hook." Fortunately "Flags of the Old Regime" leaves the battling out.