And now some details by Marc Malkin on E! Online
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What Robert Pattinson, Kristen Stewart and Taylor Lautner were doing backstage? Well, Robert was dancing to "Single Ladies,"
(...)Rob and Kristen weren't about to give any indication they were a couple. Even backstage, there was no PDA. But they did sit together and chat for a bit.
They were silent when Lady Gaga came into area covered in fake blood after her performance. But they both giggled when Gaga came out from behind makeshift dressing room in her face-covering red lace get-up.
After presenting the New Moon trailer, Rob, Kristen and Taylor came back to talent holding area for photos.
And that's when Rob did a little jig to "Single Ladies" while Beyonce's performance was on monitor.
Then they were taken to their cars and may have been going to fly back to Canada.