Katy Perry stepped on the red carpet at the Grammy Awards 2014 with her boyfriend John Mayer, and wore an ethereal frock that was so appropriate for the occasion. The white, sheer sleeveless gown was fitted at the bodice before it flared out, revealing the musical notes that are printed on the skirt of the ensemble. She finished off her look by pairing the Valentino couture gown with a tight, high-bun.