Janet Jackson and Missy Elliott, on one song—that is the first thing fans heard when Janet kicked off her Unbreakable World Tour last night in Vancouver. Reportedly titled "Burn It Up," this is a dance floor anthem where Janet sweet-talks the DJ and Missy keeps the energies high. In reality, though, the stakes for this song are much higher, with it coming from two ladies who have been sorely missed: Janet's Unbreakable will be her first album in seven years. Missy appeared during Katy Perry's Super Bowl halftime show and in Ciara's new album Jackie, though she herself hasn't dropped an album in a decade. Watch the live debut of their collaboration below.