Demi Lovato upset over `Shake It Up` Disney joke

New York: Singer Demi Lovato is upset after Disney channel`s show `Shake It Up` poked fun at eating disorders.

The 19-year-old actress took to Twitter to express her anger and posted: "What are we promoting here? I find it really funny how a company can lose one of their actress` from the pressures of an EATING DISORDER and yet still make (a) joke about (it)."

Later Lovato got a response from a Disney channel representative who said they were pulling out the episode she originally referred to, along with an episode of "So Random!" that also pokes fun at food issues, reports people.com.