They were left furious that it just didn't justify her high ticket prices.
The 25-year-old singer might have made history by becoming the youngest performer to sell out the FNB Stadium in Johannesburg, but her fans have been left disappointed post the concert, Radar Online reported.
The front page of The Star Johannesburg newspaper blared "Ri-Ri Rip-Off!" calling her performance "below par".
The article cited allegations saying that the Poker face 'hitmaker' was miming some of her songs, did not perform even a single costume change or perform to some of her biggest hits.
Staff photographer Sharon Seretlo claimed that the lip-syncing was obvious, as he was standing very close to the stage.
--ANI (Posted on 15-10-2013)