Kimberly Perry: We really love the song “Stay” by Rihanna and Mikky Ekko. I remember watching them perform it for the first time. Man, it was just so emotional. Rihanna was kind of shaking when she performed the song. I immediately downloaded it off iTunes following that, and now it’s on repeat on the tour bus. And I also love it because Mikky is a writer in Nashville and it’s cool seeing a Nashville representative on pop radio.