More than a decade after the release of their smash hit single "The Boy is Mine," Brandy and Monica have reunited for another sure-to-be classic number, "It All Belongs to Me." "The Boy is Mine" became one of the hottest songs of the 90s, topping the U.S. Billboard Hot 100 for 13 weeks, but Monica revealed that two singers spend time reminiscing. "We talk more about personal growth and some of the things we've experienced so we can really further our friendship," said Monica.