Sources connected to the singer tell TMZ ... she wants a fresh start after her 60 days in rehab for an eating disorder, and the moniker she uses in her name reminds her of her "old self."

So from now on, it's simply Kesha.

We're told she's spending a lot of time with a therapist who will continue what she calls a work in progress.

Kesha is also following the advice she got in rehab — get rid of the negative people in her life who contributed to the problems in her life that led to the eating disorder.