Madonna already told you — she’s a “Material Girl” in a “material world!” The Queen of Pop recently celebrated her 66th birthday with a lavish vacation in Italy, though she reportedly had “very specific instructions and demands” when it came to perfecting festivities ahead of her special day. “Whether she was staying on a yacht or in a villa, she only wanted handsome young men working on the staff,” a source confessed to a news publication after Madonna was seen visiting the European country with her rumored boyfriend, Akeem Morris, 28, earlier this month. The insider spilled: “She also had a …