Get ready to "Roar," KATY PERRY is here! The California Gurl returns to Ellen's stage to sing, dance, and wow us with her illustrious glow and animated personality! Katy made pop music her forte with her powerhouse vocals, delectable tunes and charismatic performance skills. Pink, purple, green, blue, red; this talented young star embraces the spectrum of color throughout her style, music and creative vision. After dominating radio and Billboard charts with her albums "One of the Boys" and "Teenage Dream," her fourth studio release, "Prism," has the world “dancing through the fire!” Plus, she just earned her 11th Grammy nomination! Ellen is all eyes and ears when one of music's most loved singers drops in for another chat and performance! Then, it's the last day of 12 Days of Giveaways, and certainly not the least! Day 12 always feels like the biggest of them all, so who knows what Ellen has up her sleeve? It could be her most amazing gifts yet! On Friday, Ellen parties with a champion!