Now there's another heart-rending ballad from the album to come to the surface, "By the Grace of God", which Katy premiered live at the iTunes Music Festival in London.

Perry spoke earlier with Billboard about the song, saying, "That song is evident of how tough it really was at a certain point. I asked myself, 'Do I want to endure? Should I continue living?'"

If you want to see Katy Perry perform this song and more of her new album PRISM in 2013, your only other chance is through Radio.com. Perry announced that her lone 2013 concert will be a breast cancer benefit, scheduled for Oct. 23 at L.A.'s legendary Hollywood Bowl, sponsored by CBS RADIO.