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Don’t expect to find Mischa Barton sending out Tweets anytime soon. The star recently lambasted celebrities who use the popular social networking site Twitter.

“People are obsessed with it but I think it’s a waste of time. I mean what do they think they are achieving?” the 23-year-old former star of The OC said during the Harrods opening sale in London Saturday.

That’s odd…Isn’t she a member of Twitter.com?