Beautiful makeup! But I agree, I don't love the back of the top because of how low the gap goes.. But are you wearing pants with it in the picture? I'd switch them for something high-waisted to show a little less skin in the back.
Those lips are everything babe, j'adore! Advice: The dress could've worked but it's half-steppin'. The front whispers "I'm sophisticated", and the back screams "Easy A" because it's too low.