Young singers Jordin Sparks and Chris Brown now share more than both being born in 1989: The unlikely pairing has crossed together into top 40 with the second single from the "American Idol" season-six victor's self-titled debut album, following her top 10 debut, "Tattoo." R&B singer Brown has already scaled the Billboard Hot 100 twice, with 2005's "Run It!" and 2006's "Kiss Kiss," both of which also leaned upon guests: Juelz Santana and T-Pain, respectively. "No Air" is a sweeping midtempo jam that pushes boundaries, allowing Sparks to show a looser, soulful side, while Brown is cast as pop crooner more than ever before. The result is organically convincing, and likely to offer both artists newfound crossover potential. Clever enough, and a fine song that ultimately gives the "AI" alum a heap of befitting credibility. —Chuck Taylor