Risqu business: Kylie as she's never been seen before

Back to black: Kylie is preparing for a world tour to mark her 40th birthday in May next year

He told The Sun: "I'm heading back into the studio with Kylie in February to start training for the tour we want to do in June.

"It's going to be fabulous. I have a couple of ideas but they need a bit of work. It takes ages to pull it all together so we want to take our time on it."

Sources say doctors have warned breast cancer Kylie about pushing her body too hard.

An insider said: "Kylie is determined to do this tour. She was upset that she had to pull out of the last one - the Showgirl tour - when she received her cancer diagnosis.

"If it was up to her, she'd do an endless string of dates but doctors say she needs to make herself priority and takes more time to relax.