Richard Marx took a shocking jab at Dr. Drew Pinksy in the wake of Mindy McCready's death Sunday, comparing the TV doctor to suicide doctor Jack Kevorkian, as Mindy's death marks the fifth casualty from of the 41 famous faces to seek treatment from Pinksy's VH1 series, Celebrity Rehab.

"Such a drag to hear about Mindy McCready. Her poor children," the Right Here Waiting singer