But Planet Hollywood was blown away by ticket sales, which they said broke Vegas records. So Britney's people went back to the bargaining table and hashed out an amendment -- with back end, merchandising and other perks, the singer will earn around $475,000 a show. Celine Dion, the top money earner in Vegas, makes $476K a show.
Planet Hollywood actually added shows for Britney ... she'll now do 140 shows during the 2-year residency.
Bottom line ... with all her ventures ... we're told EVERY WEEK, Britney's people deposit around 1 MILLION DOLLARS in her bank account.