10 Things To Know Now: Rihanna And Taylor Swift To Perform At Grammys, And Own Kanye West's Shoes!

Rihanna and Taylor Swift will perform at the Grammys and more in this week's 10 Things To Know Now! 1.) Rihanna, fun., The Black Keys, Taylor Swift, and more are slated to perform at the 55th Annual Grammy Awards! Let the countdown to the big day begin (32 days, BTW!). (MTV News) 2.) Now you