The 'Mean Girls' actress dated the DJ on and off from 2008 until 2009 but Lindsay's dad believes Samantha was using her for fame and treated her badly.
Speaking on Nik Richie's radio show, he said: ''I pity her. Lindsay was in a pretty OK place at the time--until she got involved with Samantha.
''Samantha got Lindsay at a very vulnerable time in her life. When her mom and dad were going through a divorce and Lindsay started drinking and partying and didn't know where to go.....Samantha got her when she was down.
''Samantha dragged her to the level which is below the barrel.
''Where's Samantha now? Do you see Samantha in the press? Do you see her getting press? No! Because she's not with Lindsay anymore, that's pretty pathetic!
''Samantha was always spinning for $500 at a club, after she met Lindsay she would get in excess of $25,000. People use Lindsay like that, she's very susceptible.''
Michael also denied Lindsay was gay, claiming her relationship with Samantha was just an experiment.
When asked how he felt when she ''became a lesbian', Michael replied: ''When she became a lesbian? [You mean] when she experimented. She's with guys now.
''She met Samantha and then she went back to being with guys again.''