Britney Spears riffs and rocks a British accent as she covers Rihanna’s 3X platinum hit from 2006, ‘Unfaithful.’ In the Instagram video, Britney’s wearing a polka dot crop top, knee-high boots and her signature low-rise shorts. The performance comes after Britney promised fans she’s writing two new novels and splitting her time between Miami and Mexico. In the meantime, her ex-husband, Kevin Federline, is preparing to release his tell-all memoir, ‘You Thought You Knew, ‘ dropping Oct. 21.
