MADONNA is either really enjoying being single, or her camp is really enjoying planting stories for the press to cover. The latest Madonna news is that she hooked up with a gorgeous Brazilian model named Jesus Luz while shooting her W magazine spread in the posh Hotel Gloria in Rio de Janeiro last weekend. According to NY Post spies and to Glamurama.com.br., Madonna was so interested the boy, she invited him to join her tour in Sao Paolo and he accepted. "He's there with her now and [photographer] Steven Klein is helping him get along with everyone," said the insider. So what does Madonna's rep Liz Rosenberg have to say about all this? Last week Madonna blamed Liz for giving the AP inaccurate information about her divorce settlement, but they're not fooling anyone. - HS