Giving UK fans a sneak peek of her new music, Katy Perry performed "By the Grace of God" at the iTunes Festival in London on Monday (September 30).
Making good on her promise later that evening, the 28-year-old pop star tweeted, "You want another shade of #PRISM? Let's take WALKING ON AIR to the TOP spot & in exchange, I'll play a NEW song you've never heard tonight!"
She’s been living in her famous sister’s shadow, and now Briana Cuoco has a chance to really make a name for herself.
As her famous sibling Kaley Cuoco freaked out backstage, the brunette songbird took Lady Gaga’s “You and I” to new heights and even attracted two interested coaches in Christina Aguilera and Cee Lo Green (she went with Xtina).