Doctors hoping to "get the NHS to number one" for Christmas are attracting thousands of supporters on Facebook.
Organised by a team of three junior doctors, the song hopes to raise awareness of vital NHS services and send a positive message about the health service.
The track - A Bridge Over You by Lewisham and Greenwich NHS Choir - is backed by a tear-jerking YouTube video showing clips of NHS doctors treating patients, looking after tiny babies and administering life-saving surgery.
Harriet Nerva, Katie Rogerson and Joe Blunden have put their names on the Facebook page as organisers of the campaign.
They said all proceeds from sales will be given to health charities.
The campaign preamble reads: "The NHS faces a cruel winter ahead. Budget cuts, low staff morale, junior doctors balloting for industrial action, and hospitals up and down the country being classed as 'inadequate'.
"We are closer than ever to that cliff edge, but we WILL NOT let the NHS fall."
The team has asked people not to buy the track online until the week before Christmas in a bid to ensure it reaches the top of the chart.