Recently, after playing Sugarland's cool new song "Tonight," I mentioned how much I enjoyed their performance of that song on the recent Academy of Country Music Awards. And then I went on to say I wasn't sure why Rihanna later joined the duo's Jennifer Nettles for a performance of her big pop hit "California King Bed." It's a good song. And Rihanna is enjoying a stellar pop/r&b music career. More power to her. But it just all seemed so random.