‘All I Do Is Prayer’: Pop Sensation Sister Cristina of CBS’ ‘The World’s Best’ on Faith, Lady Gaga and Singing for $1M | Pop Sensation Sister Cristina of CBS' The World's Best' on Faith, Lady Gaga and Singing for $1M

‘All I Do Is Prayer’: Pop Sensation Sister Cristina of CBS’ ‘The World’s Best’ on Faith, Lady Gaga and Singing for $1M | Pop Sensation Sister Cristina of CBS' The World's Best' on Faith, Lady Gaga and Singing for $1M: Having conquered Italy, can singing sensation Sister Cristina take over the world? Now, the little sister with the big pop voice is taking on American TV and a panel of international judges on CBS' new Wednesday-night reality-competition show. "The World's Best."