FKA Twigs [1] made her US TV debut on The Tonight Show Starring Jimmy Fallon on Tuesday night, and she made sure to give an incredibly memorable performance. The British singer — who is probably best known in America as Robert Pattinson's girlfriend [2] — sang her latest hit, "Two Weeks," off her debut full-length album, LP1. FKA Twigs performed with the aid of several fans and a floaty piece of fabric, which she waved around during her performance. Watch the entire clip above, and be sure to check out more must-see viral videos [3].