Singer Robin Thicke is once again in the middle of his 2013 copyright infringement case with his hit song "Blurred Lines" as his previous deposition video recently circulated online, showing him saying how he was under the influence of drugs and alcohol during his publicity interviews in 2013 for his case against the late Marvin Gaye's estate.

The case, which opened back in 2013 when Gaye's heirs sued Thicke, Pharrell Williams and T.I. of plagiarizing Gaye's 1977 hit "Got to Give It Up," had Thicke do a deposition regarding the matter. The video apparently got leaked with Thicke saying how he was drunk or on drugs in all of his 2013 interviews.

"With all due respect, I was high and drunk every time I did an interview last year," Thicke said as quoted by 9News. "I didn't do a single interview last year without being high on both."

During that time, Thicke also revealed that he considered himself dishonest during interviews. "When I give interviews, I tell whatever I want to say to help sell records," Thicke said as quoted by Stuff.

Even during his Oprah Winfrey interview in 2013, the singer was apparently drunk and on Vicodin, a prescriptive painkiller. The reason of Thicke's action could be because, at that time, the singer was struggling with his personal life and his separation with "Mission Impossible" star Paula Patton.

In a previous interview with the New York Times in July, Thicke revealed that his deposition that he previously didn't go into details to was the truth, different from what he had been saying in his previous interviews in the past regarding his hit song "Blurred Lines."

"What I will - what I can say - is that when I did the deposition, it was two weeks after my separation from my wife. I was going through personal hell at the time. And I was careless in the deposition. I can't go into the details of what was said in the deposition beyond that, because of the ongoing litigation," Thicke said as quoted by The New York Times.

The case previously had Thicke and Williams ordered to pay $7.4 million in damages to Gaye's estate, which was then later revised to $3.2 million when Thicke's party appealed, per 9 News.

"I was surprised. Very surprised. Obviously, that's why we're appealing. I know the difference between inspiration and theft. I'm constantly inspired, but I would never steal. And neither would Pharrell," Thicke said in his previous New York Times interview.