Patients on 'Celebrity Rehab with Dr. Drew' (Sundays, 10PM on VH1) tend to have more than their fair share of rocky relationships. That's especially true of Michael Lohan, who had an explosive blow-up with his ex-fiance Kate Major, who he and Dr. Drew have been trying to convince to enter treatment.

The incident started when Lohan appeared in a tabloid report kissing Kim Granatell, better known as Kim G from 'The Real Housewives of New Jersey.' That sent Major, who was on her way to the Pasadena Recovery Center for visiting day, into a fit, which soon escalated into a phone shouting match. Lohan worked himself into a rage while denying that he kissed Kim G., and threatened to leave rehab as he was being told he needed to calm down because of his heart.