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Comedian Joan Rivers arrives for the premiere of the documentary "Joan Rivers - A Piece Of Work" during the 2010 Sundance Film Festival in Park City, Utah, in this January 25, 2010 file photo. Rivers, a veteran of cosmetic surgeries and snarky red carpet commentary, recently plied her trade on a little-known New Orleans stage, cracking wise and raising money for a community center run by a voodoo priestess. REUTERS/Lucas Jackson/Files (UNITED STATES - Tags: ENTERTAINMENT HEADSHOT) Image Credit: REUTERS

Singer Rihanna has blasted comedian Joan Rivers after the latter made rough comments on her recent emotional breakdown on Oprah Winfrey’s show.

Rihanna, 24, broke down when she accepted that she still loves her ex-boyfriend Chris Brown, who was accused of assaulting her.

Rivers expressed her disagreement over the issue on Twitter, reports contactmusic.com.

“Rihanna confessed to Oprah Winfrey that she still loves Chris Brown. Idiot! Now it’s my turn to slap her,” she tweeted.

This irked Rihanna. She replied on Twitter saying, “Joan Rivers wow — u really do get slow when you’re old huh? Slap on some diapers.”