I need a healthy diet I can stick to?

Ok, so I need a healthy diet that I can stick to (not NOT eating food, just a healthier way of eating) and stuff so I may stay thin. I am a actress so I need to stay thin. Also, right now I am getting a little chubby, so I need help with that. I am skinny, but if I continue eating like I do, I am going to be chubby. I need suggestions on how many time I should work out a week, and what I should do for working out. I have a gym close to me so you can suggest machines. I also need to know what foods to eat to maintain my weight. If I have to I will buy as much groceries as I need. So pretty please help me! I will give ten points to the person with the best answer. please? I will also thank you when I win my first Grammy! LOL! So seriously please help me. Thank you so much. BYEE!