Has pop superstar Madonna lost her appeal?

Pop diva Madonna's Rebel Heart tour is seeing a major slump in ticket sales. Photo / Getty

Pop superstar Madonna is battling a huge slump in ticket sales.

The current Rebel Heart world tour is making up to 50 per cent less money than her last outing.

The Holiday singer launched shows in Montreal, Canada in September, three years after she last hit the road with the MDNA tour.

But newly-released figures show Madonna's latest trek is struggling to match the box office receipts she scored in 2012.

Sales have halved on many stops, according to the Boxscore data published by Billboard.com.

Madonna brought in around NZD $5.2 million for two nights in Toronto last month, less than half of the $11.4 million she made for a pair of shows at the same venue in September, 2012.

Figures also reveal a Rebel Heart concert at the Boardwalk Hall in Atlantic City, New Jersey on October 3 brought in around 48 per cent less cash than a previous show there.

Madonna's tour has moved to Europe this month, with performances kicking off in Germany on Wednesday night before planned stops in Sweden, Italy, Spain and the UK.

Rebel Heart will return to the U.S. in January (16) ahead of the Asian and Australian legs of the tour, which concludes in Brisbane on March 27.

- AAP