The Gossip Girl star insists she will never strip for an acting role because she finds on-screen nakedness unnecessary and "distracting" to the plot.
In an interview with Style magazine, she said: "When I see nudity in movies, I am always distracted by it. I know that if I am watching a scene and someone has their boobs out, then that's all I'm looking at - I can't help it. I just don't think that will ever be right for me."
Although she is reluctant to show it off, the 24-year-old actress has an enviable body. However, Blake - who is the face of Gucci's new fragrance Gucci Premiere - insists she does virtually no exercise to maintain her slim figure.
Blake admitted: "I am terrible; I don't do any exercise - I'm going to have to learn the hard way. I love food too much, and my family is from the South, so the food I like is not necessarily the best for you. "There are days when I will be like, 'Oh my goodness, I am not happy with the way I look because I cannot fit into any of my clothes'. So I eat quinoa that week, and then I feel good."
Blake recently purchased a house in New York with her boyfriend and Green Lantern co-star Ryan Reynolds.