Madonna flashes during Istanbul gig

Even though we think Madonna - for all her faults e.g. that mask for a face - has still got an enviable rack, we're not sure how we feel about her getting her boobs out on stage. Or even one boob.

As this fan-filmed video seems to show, the Material Girl did away with a section of her bra during one of her songs on the Istanbul leg of her MDNA world tour.

From the looks of it (best listen on mute, it's a terrible quality recording), she pulls a panel of her bra down to expose her boob.

This wouldn't be the first time Madonna's boobs have got attention - from the Gaultier conical bra to those pre-fame nude modelling shots which emerged in the early 80s, from completely exposing them (behind some very classy lace, mind) in the Vogue video to demurely covering them up in the promo videos for Ray Of Light's singles. But at 54, is she too old to be getting a boob out? And why only one?