Tove Lo appeared on Fallon last night to perform her latest single, “Cool Girl,” which made it into our 5 best songs list when it came out last month. Her performance last night was insanely lively, and went down right after Fallon interviewed the kids from Stranger Things. Eleven performed Nicki Minaj’s verse from Kanye West’s “Monster,” and then Tove Lo ripped through “Cool Girl.” Watch below.