Madonna 'freaking out' about world tour

Madonna is feeling "freaked out" ahead of her upcoming world tour, admitting she has "never worked so hard or been so scrupulous" about any of her shows.

The pop superstar kicks off her latest concert series in Israel next month (May12) and has been working hard to get the shows ready, even breaking one of her fingers during rehearsals.

The Holiday hitmaker confesses she is doing all she can to impress fans at the gigs.

She tells Britain's The Sun, "I have to say that in more than 25 years of performing I have never worked so hard or been so scrupulous. Or freaked out more than I have at the minute.

"There's been lots of cardio and I'm doing a combination of Pilates and dance cardio. And there's been plenty of skipping rope work. The envelope I'm pushing for is as spectacular a show as I can. It should be a feast for the eyes and ears."

However, Madonna admits there is a crowd she struggles to impress - her children.

She adds, "My kids are brutally honest when it comes to what they don't like. They have no tact whatsoever. They'll just say, 'Mum, get that song off' even when (it is) mine. It's hurtful but at least they're honest."