Preheat oven to 400 degrees. Season shrimp with salt,pepper and olive oil. Stir well,spread shrimp on a cookie sheet in one layer. cook shrimp 3 minutes,turn shrimp over,cook 3 minutes more. Make garlic butter by mixing butter,salt,pepper,garlic and parsley.Pour butter over shrimp stirring well,cook 2 minutes more. Sprinkle with lemon juice. Remove from oven,serve hot.