Robin Thicke has admitted that he had very little involvement in hit single Blurred Lines and spent most of last year battling drug and alcohol addiction. The family of legendary soul star Marvin Gaye are currently suing the team behind the track as they claim it is based on Gaye's Got To Give It Up and in a legal deposition, Thicke revealed that he turned up to the studio high on Vicodin and alcohol, leaving Pharrell Williams to write "almost every part of the song". "I was jealous and I wanted some of the credit. I tried to take credit for it later because [Williams] wrote the whole thing pretty much by himself and I was envious of that," he said. He went on to say that he had been under the influence of drugs during all of his interviews that year and wife Paula Patton had left him after he told her the truth. “Every day I woke up, I would take a Vicodin to start the day and then I would fill up a water bottle with vodka and drink it before and during my interviews,” he admitted. Williams backed up Thicke's comments in his own deposition, obtained by The Hollywood Reporter, saying that singers are regularly listed as co-writers despite making little contributions to hits. “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.”