With her epic four costume changes at the Super Bowl, we're guessing Katy Perry has plenty of style tricks up her sleeve for her 2015 Grammy performance. Perry pulled out all the stops on the 2015 Grammy Awards red carpet in a Zuhair Murad dress. The 30-year-old singer said she wanted to "shine bright like a diamond," which she accomplished with the shimmering number and a Harry Kotlar canary yellow diamond ring worth $2 million dollars.