Rihanna recently tweeted a photo of Nicole Richie at the Met Ball, saying that she "makes [her] throw up," but in a good way.
The Instagram photo read, "B*tch makes me throw up! #bestdressed #2013metgala."
It showed Richie in a shiny white dress with silver/purple hair and dark makeup.
Though Rihanna's tweet almost seemed offensive, Richie appreciated it and retweeted it. She also tweeted a reply, "Currently shining bright like a diamond, a ruby, & 2 emeralds. @rihanna."
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Rihanna was enoying the Met Ball fashion but did not attend the event.
Her now ex-boyfriend Chris Brown attended with a new woman on his arm.
They have both admitted they have split up, with Rihanna writing on Tuesday, "Settling is not an option! Nothing less than 100% loyalty, honesty, and respect!! Love ain't for kidz #butimsleeptho."
Sources: Daily Mail