Victoria Beckham has once again defied gravity, this time on a shopping trip with her sons.The metallic platforms seemed innocent enough, but on closer inspection, Victoria made making her way through the shopping mall in a pair of dangerously thread-thin stilettos.Unsurprisingly though, the ultra-skinny Spice Girl, who claims to be unable to concentrate in flat shoes, kept her balance.Perhaps it was the oversized handbag - and holding Cruz’s hand - that helped keep