Aretha Franklin has axed another trio of concerts on medical grounds.

The Queen of Soul has already scrapped two upcoming shows this week (begs20May13) on the advice of her doctor, and she has now cancelled another three - one in her native Michigan and two in Canada.

Details of what ails Franklin have not been disclosed, but Catherine O'Grady, the director of the Ottawa Jazz Festival - where the star was set to perform, says, "It's doctor's orders. She's really not well."

Her spokesman David Brokaw adds, "She's going to resume her schedule in July."

It's not the first time she has scrapped gigs due to poor health - she called off a series of shows in 2010 and refused to divulge details about her medical issues for two years, until revealing in early 2012 that she had undergone surgery to remove a tumour.

The 71 year old has also battled health problems with her legs and feet, which forced her to pull out of performing at Whitney Houston's funeral last year (12).

Franklin ignored doctors' orders last week (16May13) to perform on the American Idol finale via satellite. She sang her hits (You Make Me Feel Like) A Natural Woman and Respect with the all-female finalists.