I'm someone who has also gained a few *highly unwanted* pounds. I'm working towards losing the weight. But in the meantime, my tips are:
1) Always have great hair. It draws the eye up towards your face.
2) Light but flattering makeup *keeps* the eye on your face longer. You're a really pretty girl, highlight your best features.
3) People tend to notice a beautiful bag before they notice that the woman carrying it may be carrying a few extra pounds Another thing - I've heard fashion experts say that your handbag must always be in proportion to your own scale but I've noticed that when I carry an extra-large tote, I just look smaller in scale next to it
4) Beautiful nail paint also distracts. No one is looking at your food baby when they are busy looking at your pretty nails
5) A pretty scarf helps hide lumps and bumps while being a gorgeous accessory. This is my fav thing to do if the weather is cool enough for a scarf
6) Show skin somewhere else. For example, I've gained weight on my belly. So I expose more leg, and wear a slightly slouchy top with my shorts & skirts for it to look more 'intentional'. If you feel better about some body part - show it off! Cold shoulder tops, sleeveless, deeper necklines, cut away back, shorter skirts - they all work.
7) ETA: Most important- make yourself believe you are gorgeous. Honestly, no way can you fake it until you make it if you're conscious of your weight. Trust me when I say this - most ppl don't even notice it on their own. It's our body language that gives us away. It says "I'm not feeling fab" or "I'm not confident of how I look". I'm quite the expert on Fake It Until You Make It....trust me. Smile and look self-assured even if you aren't feeling it! Looking great has more to do with your attitude than your actual weight. I've 'looked' fatter in photos when I weighed 8 pounds lesser.