Scotty McCreery "goes back" to his country roots (seriously, Scotty?) with "I Cross My Heart" by George Strait. Anyone surprised he chose a tune from a movie called "Pure Country"? Jennifer Lopez giggled like a school girl, and Steven Tyler thinks everyone’s fallen in love with his voice. "A star is born on this stage," raved Randy Jackson. WATCH Scotty McCreery perform "It’s Alright Mama" from last week’s episode.