After the jump, read the supposed deets about Britney’s video collabo with Madge as revealed by The Sun …

The pair’s sexy shenanigans will be broadcast to the crowd on Madge’s upcoming world tour via 20ft screens. What a terrifying thought. I hope Britney doesn’t ask if her bum looks big on that. They will perform a mash-up of Madge track ‘Beat Goes On’ and Britney’s ‘Piece Of Me’, while they are unwrapped from costumes that can only be described as bondage mummy. The pop duo will be wrapped in BANDAGES which will then be unravelled by leather thong-clad male dancers … An on-set source revealed: “It’s absolutely classic Madonna. Probably the raunchiest stuff she has ever done. It leaves nothing to the imagination and will be very controversial. Britney and Madonna are unwrapped like mummies, to appear together almost naked apart from tiny leather bondage pants and knee-high boots. They then dance closely together, pressing their hands and bodies together. There will be big rows over whether it is sexy, shocking or both.” Britney has been filming scenes at a Hollywood studio and was snapped leaving a nearby hair salon looking more spruced up than she has for ages. It’s good that Madonna is helping her rebuild her career, but I’m still not convinced I’m ready to see her stripped down to her smalls. The Toxic singer will also perform to Madge’s 1995 track Human Nature. And in one scene to be broadcast during the tour — which opens in Cardiff on August 23 — Britney loses her mind after getting stuck in a lift in a short film by New York photographer STEVEN KLEIN. The source added: “We’ll see Spears going crazy in an enclosed space — screaming, pulling her hair and banging her fists on the lift walls as it’s stuck between floors. She really loses it.”

HMM … these are a lot of details from a supposedly super-secret, closed set. There may be some truth to these reports but, then again, this could all be fabricated rumor. The bit about the elevator has also been reported by US Weekly so that portion might turn out to be true:

“She [was] shot in the elevator that is surrounded by seven cameras,” a source tells Us. “Britney walks into the elevator wearing a black hoodie, and you can’t see it’s her at first,” the source adds. “As the elevator goes up, it becomes clear it’s Britney and she’s anxious and nervous.” Realizing she can’t get out, she “starts to kick the wall and hit things,” the source adds. “At one point she screams into the camera.” Her parting shot? Spears … takes off her hoodie, looks straight into the camera and says her infamous lyric: “It’s Britney, b-tch!”

Whatever the case may be, whether these reports are true or not, I’m sure that this video will be very steamy, controversial and shocking — what better way to build up hype for this tour? I’m taking all of this with a grain of salt … I’ll wait until the tour kicks off (and the photos come out) before I really believe any of this.

[Photo credit: Splash News; Source, Source]