After just announcing dates for its upcoming tour with CSS and Neon Indian, Sleigh Bells has premiered its video for “Rill, Rill,” the band’s most gentle and sing-songy track from 2010’s debut hit Treats, on MTV. Continuing the band’s smoking-in-the-bathroom high school theme, Ms. Krauss gets street tough for art class in her denim jack and ammo belt strung up like Rambo. But she’s just chilling and posing for her senior portrait with a raven and switch blade and ditching school through the back door so Mr. Miller can toss her the keys to an ’80s Corvette and the duo can drive off into a desert sunset all badass-like. No big deal.