The revelation came in a deposition (that can be used as evidence) video that was released on Saturday, reported Entertainment Tonight.
"I didn't do a single interview last year without being high on both (alcohol and Vicodin). With all due respect, I was high and drunk every time I did an interview last year. When I give interviews, I tell whatever I want to say to help sell records," the 38-year-old singer said.
The deposition was done as an evidence for the lawsuit accusing him, Pharrell Williams and TI of ripping off of Marvin Gaye's 1977 hit, "Got To Give It Up" to create "Blurred Lines".