Madonna is allegedly dating ex-boyfriend Alex Rodriguez.

The 'Celebration' singer – who is believed to have reunited with Brazilian model Jesus Luz this week following a recent split – is apparently still seeing her former baseball star lover, who is nicknamed 'A-Rod', and visited him in Miami last week.

A source said: "Madonna spent two nights with him in his beach house in Miami last week and Jesus had no idea.

"She just didn't tell him, and her staff were told not to tell him. She claims she has an intellectual connection with 'A-Rod'.'

But Madonna – who was rumoured to be dating Alex after she split from now ex-husband Guy Ritchie at the end of 2008 – isn't prepared to let Jesus go because he is 'in awe' of her.

The source added to The Sun newspaper: "Jesus is really, really into Madonna but he's more like a little personal project to her. They are together when she wants them to be together. She decides what he wears, she has sorted English lessons for him and she even paid for his apartment. He's like a little sheep in awe of his mistress and she loves that.'

The 51-year-old pop superstar is also said to have developed a deep connection with Carlos Leon, the father of her 13-year-old daughter Lourdes.

The source explained: "When Madonna split from Guy Ritchie, Carlos was there for her.

"They spent a lot of time together and old emotions came back. But Carlos has a lovely girlfriend who Lourdes doesn't like, which has made life difficult. There will always be a big connection between Madonna and Carlos.'

However, all this male attention doesn't seem to be making the 'Like a Virgin' star happy.

The source added: "Despite all the guys in her life, she's extremely lonely since her divorce. She has everything but she never seems happy."

Madonna has four children – Lourdes, her nine-year-old son Rocco with Guy Ritchie and two adopted kids, David, four, and five-year-old Mercy.