Katy Perry does not approve of dating Rihanna with Chris Brown

Reportedly Katy Perry does not approve the return of the love affair between his girlfriend Rihanna and Chris Brown. During the Grammy Awards, the two singers were distant, apparently due to be Katy avoid being close to the couple. So she sat on the opposite side of the room, along with her boyfriend, singer John Mayer. Rihanna has already said that he has no problem with Katy Perry, but that will not accept anyone meddle in their relationships. What do you think of this situation? You may be concerned a friendship?