Today's two WCWs are Rihanna and Ariana Grande. It was announced earlier this week that Ari has officially surpassed RiRi as the most-streamed artist of all time on Spotify, with over 20.5 billion-plus streams. This picture of them together was taken back in 2014 at the iHeartRadio Music Awards, but I'm hoping this announcement will lead to a new collaboration!