Ever the professional, Britney Spears showed up more than 12 hours late to the set of her new video for “Piece of Me” — pissing off everyone from the crew to the dancers.  We wonder why she had a call time of 8am set for the shoot when she knew she had the boys that day and that woudln’t be picked up by Kevin Federline unitl after 7pm that night.

Britney didn’t do much work once she finally got there at 8:35pm. In the video, Britney and four look-alikes try to trick the paparazzi, but Britney used a body double for all the scenes that didn’t show her face.

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