The actress explained that she said she would never return to her TV show Gossip Girl if they didn't allow her time out to star in the movie Country Strong.
She told Company: "Obviously we're under contract for a certain amount of time in Gossip Girl. In the fourth year they started going, 'OK, we know the timing of things. We know how much we need you and how much we don't', so they've been kind enough to let us out.
"When Country Strong came up though, I threatened everybody including my manager, my agent and everybody I worked with. I was like, 'If I can't do this, if we can't work out the schedule, I'm moving to Costa Rica, I'm turning off my phone and I'm never going to work again'.
"I was bluffing of course but it worked."
Meester insisted that she's glad she starred in the film because it's her "best work".
She added: "It's a beautiful movie. The best thing I've ever done.
"There's something for everyone - the music, the performances, which are super-fun and energetic. Then there are the love stories. There are the struggles of friendships and all the drama that comes with the limelight."