This week on the “World Chart Show”: As legendary rockers KISS and Motley Crue announce their joint world tour, KISS member Gene Simmons criticizes Rihanna. We’ll also tell you who Lana Del Rey’s been cozying up to…and whose home Rihanna was spotted leaving at 4 a.m. Plus, this weekend music lovers everywhere are gathered in the California desert for the annual Coachella Music Festival. We’ll tell you more about it…and run down some of the countdown stars slated to perform. And Katy Perry would love to record a duet. We’ll tell you with who…and what song she’d like to remake. Also, the highest debut of the week is by an artist who calls himself a “raw foodist.” We’ll explain what that is. That’s all part of the countdown of the week’s Top 20 songs on International Hit Radio.