Ke$ha — Blames Dr. Luke for Eating Disorder — He Called Me Fat

EXCLUSIVE

Ke$ ha is telling friends her eating disorder was caused by her very own composition producer Dr. Luke  — claiming he bashed her weight and even called her a huge, stout refrigerator … TMZ has learned.

Sources directly connected to Ke$ ha tell us  … it all started when the singer’s “Get Grubby” tour finished in 2011.  She says Luke — who signed Ke$ ha to a deal at age 18 — started ragging on her over the extra lbs she had gained in her downtime.

Ke$ ha says Luke — a huge producer who has worked with Miley Cyrus and Rihanna — started calling Ke$ ha stout and urged her management team to do something about it.

Our sources say Ke$ ha complained … during a composition video shoot in 2012 Luke told her she “looks like a f***ing refrigerator” … and the singer was profoundly affected by it.

We broke the report … Ke$ ha is now in rehab for an eating disorder.

Calls to Dr. Luke went unanswered.