Photo credit:
GC Images/Getty
Images:

Newly leaked docs, uber-angry fans spark new fears for Sin City lip -syncing popped tart.
WITH fans of Britney Spears slamming her Las Vegas show, pals fear the vicious attacks could send the “Toxic” singer into a tailspin! The National ENQUIRER has obtained a secret logbook of complaints about her “Britney: Piece of Me” show at Sin City’s Planet Hollywood, and the comments are scathing!
One concertgoer wrote that after watching “the lethargic dancing along with the terrible miming ... we decided to leave the venue.” The fan, who said she surprised her young daughter with tickets that sell for up to $525 apiece, added: “The show was shockingly fake and Britney looked bored as hell, to put it bluntly.”