Think one whip-smart woman armed with a guitar, keyboard and intoxicating voice is intimidating? Try two. That's the power of Canadians Tegan and Sara Quin: identical twins whose eclectic indie pop explores the endorphin rush of new love and details every pang of its inevitable demise. But nothing is exactly as it seems, even on their intimate work as a fresh alt-folk duo in the late '90s. Instead, their arrangements are as complex as their lyrics are candid—especially as they've grown into slick New Wave mavens moulding big pop hooks into euphoric dance-floor gems.