We can’t think of a pair of bands it’d be more of a blast to bounce around in the sunshine with than these two. Last year’s Some Nights propelled popsters fun. to Top 40 fame and double Grammy wins, due in large part to hits “We Are Young” and the disc’s title track. Twin sisters Tegan and Sara released their seventh album, Heartthrob, earlier this year, which is all layered vocals and tempered angst. Just try not to sing along.