Dr. Luke: How Dare You Kesha ... Gaga Wasn't Singing About You

Dr. Luke is not letting Kesha get away with embracing Lady Gaga for Sunday night's Oscars performance ... he's lashed out at her saying "Til It Happens to You" has nothing to do with her.

Luke is responding to Kesha's tweet, "thank you @ladygaga and VP @JoeBiden for bringing attention to sexual assault at the oscars. it hit very close to my heart for obvious reasons."

Luke's attorney, Christine Lepera, tells TMZ, "Ms. Sebert [Kesha], who in sworn videotaped testimony from 2011 stated that she had never been sexually abused or drugged by Dr. Luke is neither a victim nor the appropriate person to be held up as an example for this important issue."

Kesha -- who's vacationing in Turks and Caicos -- claims Luke threatened her into denying allegations of rape during the depo.