The song “Nobody’s Business” by Rihanna (Ft. Chris Brown) is about celebrating a romantic relationship in spite of judgement from the outside world. The chorus of the song states that their relationship is "nobody's business" - in other words, it's nobody else's concern or jurisdiction to decide whether their relationship works or not. The song further speaks to the strength of the couple's bond and is a reminder to them both to find strength in their relationship and that it will ultimately withstand any judgement or hostility from the outside world. The message of the song is to live and love freely, no matter what others may think or say.