"Madonna has a crush on Isaac - it's as simple as that. M's never hidden the fact that she loves good-looking Hispanic men around her at all times. It's her type," the Mirror quoted a source as saying.
"She loves their skin tone and it's an added bonus if they're artistic, intelligent or theatrical. “She's besotted with Oscar and although nothing's happened between them she's following him around like a lap dog and loving the time she's spending with him.
"They flirt between scenes - he's a musician too and plays in a band. "They have tons in common. Madonna wanted him in the film as soon as she clapped eyes on him. He's enjoying spending time with her too," said the source.
However, Oscar is still said to be engaged to childhood sweetheart Maria Miranda after proposing in December 2007.