To start this post, let me throw out some numbers: over one million downloads of his debut album, almost one million plays on Last.fm, more than 400,000 YouTube views, and about 21,000 followers on Twitter. Up-and-coming pop artist Simon Curtis boasts these numbers without a recording contract. After starring in Nickelodeon’s made-for-TV musical “Spectacular!” and nabbing a guest spot on “Hannah Montana,” he set his sights on pop superstardom. Last March, he independently released the album, “8Bit Heart,” for free through his website, and he’s since been one to watch on the pop music scene. Filled with top-notch production by his sole collaborator, Jeff “Jadion” Wells and infectious choruses, the album rivals those topping the Billboard charts today. This spring, Curtis will release his follow-up, “RΔ” (pronounced Rah), named after his fan base, the Robot Army, on iTunes. Snippets of some of the album’s tracks can be found here.