The 'Dirty Love' singer was admitted to the Timberline Knolls treatment centre near Chicago to get help for an eating disorder yesterday (03.01.14) and friends say Dr. Luke - not a medical professional but a producer, real name Lukasz Sebastian Gottwald - has previously jibed her about her weight.
A source close to Ke$ha told TMZ.com Luke was upset after she had gained a few pounds in her downtime after her 2011 Get Sleazy tour and told her management to intervene.
The source also said that on a video shoot in 2012 Ke$ha complained that Luke - who has produced massive hits for Katy Perry, Rihanna, Pink and Avril Lavigne - told her she ''looks like a f***ing refrigerator''.
Ke$ha, 26, was signed into an eight album deal by Luke when she was 18, and they both worked hard to perfect her sound and make her a star. She has never publicly spoken against the producer, but last April a group of her fans started an internet campaign to get her released from her contract, after she indicated on her reality TV show she didn't have the creative control she wanted over second album 'Warrior'.
Upon entering rehab yesterday, Ke$ha issued a statement, saying: ''I'm a crusader for being yourself and loving yourself but I've found it hard to practice.