Well, this is Disturbia. As Chris Brown and Rihanna seem to be ramping up the latest installment of their on-again, off-again love affair, they've also recorded another duet that will appear on Rihanna's new album, Unapologetic. The appropriately named single gives a glimpse into exactly how they feel about their relationship - it's called "Nobodies Business." On Tuesday, Rihanna tweeted the track list from her new album, and that little gem appeared. This isn't the duo's first duet after the infamous 2009 incident that brought their unhealthy relationship public. The steamy "Birthday Cake" and Brown's "Turn Up the Music" raised eyebrows earlier this year. In a drunken tweet, Chris Brown told followers earlier this month, "When you share with history with somebody, then you tend to fall in love with somebody else, it's kinda difficult," he says. "Is there such thing as loving two people? I don't know if that's possible, but for me, I feel like that." He and girlfriend Karreuche Tran broke things off shortly thereafter. Meanwhile, Rihanna described Brown to Oprah as "the love of my life."