R&B singer Robin Thicke admitted in an April 2014 deposition that he was high on drugs and under the influence of alcohol in every interview he did in 2013, including those where the writing of his hit song "Blurred Lines" was brought up, according to a report by The Hollywood Reporter.

Thicke's deposition is in connection to a preemptive lawsuit the singer filed to ward off claims that "Blurred Lines" infringes on copyright. The singer filed the case with the song's other listed authors, producers Pharrell Williams and Clifford "T.I." Harris. 

The children of Marvin Gaye eventually filed a counter-claim which seeks to prove that Thicke's tune has indeed been copied without authorization from their father's song "Got to Give It Up".

In the copy of the deposition obtained by The Hollywood Reporter, Thicke is quoted as saying he was jealous and "wanted some of the credit" for the song.

"I tried to take credit for it later because [Williams] wrote the whole thing pretty much by himself and I was envious of that," the singer said.

When asked whether he was present during the writing of the song with Williams, Thicke said he was but said he was "high on Vicodin and alcohol" when he appeared in the studio.

"So my recollection is when we made the song... I wanted to be more involved than I actually was by the time, nine months later, it became a huge hit and I wanted credit," he said.

"So I started kind of convincing myself that I was a little more part of it than I was and I - because I didn't want him - I wanted some credit for this big hit," Thicke continued.  

"But the reality is, is that Pharrell had the beat and he wrote almost every single part of the song," the singer said.

These proclamations stand in stark contrast to the numerous interviews he did in 2013 where Thicke claimed having been inspired by Gaye to write "Blurred Lines".

In an interview with GQ, the singer said: "Pharrell and I were in the studio and I told him that one of my favorite songs of all time was Marvin Gaye's "Got to Give It Up... then [Williams] started playing a little something and we literally wrote the song in about a half hour and recorded it."

Williams addressed Thicke's new admission in his own deposition, saying "This is what happens every day in our industry. You know, people are made to look like they have much more authorship in the situation than they actually do. So that's where the embellishment comes in."