Kelly Osbourne - Kelly Osbourne Backs Joan Rivers In Rihanna Row

Rihanna took aim at the comedienne over the weekend (25-26Aug12) after Rivers mocked the pop star over remarks she made about her ex-boyfriend Chris Brown during a recent candid TV interview with Oprah Winfrey.

The Umbrella hitmaker broke down in tears during a chat with Winfrey for her Own network show earlier this month (Aug12) when she admitted she still loves her ex-boyfriend, who was charged with assault and placed on probation after he beat her in 2009.

The comment irked Rivers, who took to Twitter.com to call the star out on her confession, writing, "Rihanna confessed to Oprah Winfrey that she still loves Chris Brown. Idiot! Now it's MY turn to slap her."

Rihanna quickly retaliated, replying, "Joan_Rivers wow u really do get slow when you're old huh?", before adding, "Slap on some diapers."

River then tried to make amends by inviting her on her show Fashion Police, writing, "Honey, Rihanna, everyone knows: If he hit you once, he'll hit you again. Read the statistics. Ps - Love to have you on Fashion Police!"

And now Osbourne has backed up her pal, writing, "W/ (with) the greatest of respect 2 a young lady of whom I love please get a sense of humor @Joan_Rivers paved the way 4 all us opinionated ladies!"