Justin Bieber doesn't "mess around" in the studio.
Although the 'Boyfriend' singer is known for being a practical joker - puling off pranks on Miley Cyrus and Taylor Swift on TV show 'Punkd' - he takes his studio time extremely seriously.
He told MTV: "If I'm in the studio there's not really any time to mess around. It's always different, but always there to get the work done."
On his forthcoming third album, 'Believe', Justin worked with rapper Drake and explained how they quickly established a good working relationship.
He added: "He's a great guy and super-talented, and his melodies are crazy.
"When we go into the studio, he'll go into the booth and he'll do some melodies and we'll write."
The singer said they also connect on a personal level, and that although their careers have been very different, they are able to advise each other.
He explained: "I think it's so cool because we kind of both get what each other go through and he's able to give me different pieces of advice
"I mean, it's crazy because we both are kind of going on the same journey on different sides of the world."
'Believe' is released on June 19.