iTUNES CHARTS: The demographic extremes are represented in the store this morning, as former teen-pop princess Selena Gomez and Brit boy band One Direction zoom to the top of the albums and singles charts, respectively, while the Rolling Stones make a rare appearance with their iTunes exclusive Hyde Park Live album—one slot below Disney’s Teen Beach Movie OST. The 1D chart-topper is an especially big deal, since the group’s brand-new “Best Song Ever” has the distinction of finally knocking Robin Thicke’s mega-smash “Blurred Lines” off the catbird seat. What’s more, nipping at Robin’s heels (to employ a G-rated anatomical metaphor) is the “pool-party-ready” (according to MTV News) new single from 20-year-old starlet Ariana Grande.