ninjas. At the end of the song, she goes below the stage and returns wearing a black sparkly bodysuit for "Till the World Ends". Halfway through the performance, Nicki Minaj appears on the backdrops rapping her verse of The Femme Fatale Remix of the song. She also joined Spears to perform the verse in select cities. After the song changes back to the original version, Spears starts flying on a platform with giant angel wings. The show ends with Spears and her dancers thanking the audience, as confetti falls and the "Femme Fatale" sign is lowered onstage. Critical response Barry Walters from Rolling Stone called the show "possibly her flashiest, fastest moving, and most entertaining production yet", and added that the night belonged to Spears, as "she managed to prove that she's still progressing as a showgirl. Not only that, she's doing it better than even diehard defenders would’ve predicted. At 29, the pop star whose career seemed in danger of ending just a couple years ago has shown that she's back – hopefully this time to stay." Evelyn McDonnell of Spin said that "the idol America loves to hate went all out. Her body perpetually moved, she sang steadfastly into her headset (okay, she's got plenty of digital support, but she doesn't merely lip-sync), and she shimmied through an endless parade of outfits. [...] Having been knocked down by the tabloid press and the public repeatedly in recent years, Spears is now desperately seeking our attention. And she earns it. Haters go home." Kelley L. Carter of MTV commented that "the Spears that captivated the audience at the Staples Center [...] was the old, fun-loving, free-wheeling Spears — with a sexy, showgirl twist. There wasn't much pretense, though those glamazon outfits blinded in the best way possible. Instead, there was just good dance music." Carla Meyer of The Sacramento Bee stated that "Though Spears performed like a pro throughout the show, hitting all her marks, she had shown hesitancy in her movements — natural for the first stop on a tour. But that hesitancy vanished when she put on the denim. She seemed at ease." Shaunna Murphy of Entertainment Weekly criticized "Britney's complete lack of verbal audience interaction [...] and her obviously diminished dancing ability" but also added that "with her slim waist, her dangerously toned legs, and most importantly her engaged, wide-eyed smile, [Spears] looked happy to be