Description:Pop star Pink showed her maternal side at a concert on Sunday (March 17). During a show in Philadelphia, the singer stopped in the middle of singing her hit "Who Knew" and directed her attention to the crowd. "Is everything OK right here? Is this little girl all right? What's going on? Why is she crying? Why is she upset?" Pink asked. Concertgoers then informed the star that there was some sort of altercation, and that's what caused the little girl to start crying.(1:19)