CHART MURMUR: The #1 spot on our Building Album Sales Chart belongs, without question to Hollywood's Pop siren Selena Gomez. But how many units will the toothsome young diva sell in her debut week? And what about another Disney-affiliated project, the Teen Beach soundtrack? And the various other debuts on the chart, such as Cash Money/Republic's Rich Gang? What kind of numbers can chart veterans like Jay Z, Imagine Dragons and Florida George Line expect? Even with Selena's coronation a certainty, there's plenty of suspense on this week's chart. Keep checking in until it's final—don't let your job or basic bodily functions distract you. (7/30a)