The Sun are reporting that Madonna keeled over not once but twice while performing onstage in Bulgaria on Saturday night. The first fainting fit occurred during a rendition of Holiday, the second during Spanish Lesson.

A source speaking to the paper said: "Madge was really worried backstage. She had to sit down for a longer break than usual between songs. She refused to end the show or take a break after the Holiday dizzy spell. It turns out she's suffering from exhaustion. She is anaemic. She was advised to postpone the last two shows in Israel for a few days, but logistics and stubborness stopped her. She'll do them then take some rest."

Some  footage has been leaked on the webernet. Judging by some of the choice comments left under the video on YouTube , it seems some people believe the fainting spell was staged for publicity. We're not so sure. She's 51, has four kids, and lives half her life in the gym mainlining Kabbalah water. It was bound to happen at some stage.