When Grey’s Anatomy finally flatlines, singer-songwriters will officially be fucked. Where else will America go to discover adorable, semi-quirky crooners who sell mediocre songs masquerading as anti-corporate art? Fortunately, Australia’s Lenka is slightly ahead of the curve with her background in an ambient electronic combo known as Decoder Ring and with a melodic sensibility that’s more Regina Spektor than Jewel. Her eponymous 2008 debut sold upward of 20,000 copies on the strength of such hummy tunes as “We Will Not Grow Old” and, yes, Grey’s Anatomy and Old Navy commercial placements. But what self-respecting songstress wouldn’t covet the opportunity to drop an arty sophomore concept album on a bunch of hockey moms?