Oops! . . . Britney Spears [1] did it again. After making an epic return to the MTV Video Music Awards stage [2] in August, the singer sizzled once again with an incredible performance at the iHeartRadio Music Festival in Las Vegas on Saturday. Flaunting her fit figure [3] in a halter-neck top and feather skirt, Britney worked the crowd with a collection of some of her greatest hits. Not only did she sing her new single, [4] "Make Me . . . ," alongside rapper G-Eazy [5], but she also took us way back with classics like "Toxic," "Stronger," and "(You Drive Me) Crazy." Let's just say, we are a slave to this video.