Rachel Zoe and "Real Housewives of NYC" star Bethenny Frankel went at it via Twitter. First, Frankel called Zoe's show "self-important nonsense" and accused her former friend of treating "all her old friends like garbage." In return, Zoe said Bethenny has "no class" and told her, "u really r insane!" Hey Bravo, I feel a cross-over show coming on! [The Fab Life]
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