VIDEO : Enrique Iglesias And Anna Kournikova Show Off Babies

(CNN) Enrique Iglesias and Anna Kournikova are even better at this privacy thing than Jay-Z and Beyonce. The singer and the retired tennis star have been together since 2001 but are famously closed-mouthed about their relationship. In December it was reported that the pair had managed to keep a pregnancy under wraps and had welcomed twins Nicholas and Lucy in Miami, Florida. But on Tuesday each posted photos with newborns on Instagram using the same caption: "My Sunshine.