​It's been a year and a half since Canadian duo Tegan and Sara's latest album, Heartthrob, debuted at #3, and they're having fun learning how to navigate the big time. With a huge song from The Lego Movie and an impending tour with Katy Perry beginning in September, the twins are rolling at full speed through 2014. At this year's Outside Lands in San Francisco, they told us about mixing up their sets when serving as tour openers to suit each audience and the twists and turns that their latest album cycle has taken.