Britney Spears had two big appearances at last night's Billboard Music Awards—and "it wasn't good," snarks Matt Cherette for Gawker. The show opened with Rihanna performing her song "S&M" (complete with, oddly, "a bunch of random hands trying to caress" her crotch), who was joined by Britney half-way through. "Spears lip-synced (Rihanna sang live), danced like she had arthritis, and even managed to mess up a song-ending pillow fight," complains Cherette.
The embarrassment continued later when Spears reappeared for a performance during Nicki Minaj's set. "And by 'performance,' I mean an even-worse-than-the-first-one cameo," Cherette quips. Click to for more highs and lows from last night's awards show. (Or click here to read about how Rihanna flipped out at a 14-year-old on Twitter.)