Tulisa Contostavlos showcased her enviable figure in a black bikini while on holiday in Dubai on Tuesday. The N-Dubz singer, 35, looked mesmerising as she sported a huge gold chain and leaned against the balcony of her room at Dukes The Palm, a Royal Hideaway Hotel. Tulisa Contostavlos, 35, showcased her enviable figure in a black bikini while on holiday …