On the brown dress/top, it looks like you could use some shirring/gathers UNDERNEATH and not just in the center...it will round out the cups of the dress and hold the girls in place and give them more room...I would also lengthen that portion about two inches so they fall UNDER your boobs and not where they currently are...a dart from under your arm to the fullest part of your boob pointing downward would also give you awesome shaping...if you got 'em, flaunt them!
You might want to use the dress as a pattern on paper or old sheets first, test the fit and how it looks...I am constantly pinning paper to myself to get the right fit (isn't that why we sew?)
On the striped on --how about cutting out a "V" in the center of the bust, inserting a nice colorful fabric...it would put the attention in a better place and the focus would be on your face and bust while releasing the girls from their tight fit!
...you could even take that "V" down to about your belly button...it would almost make it nautical, which is big this year! Add some cute buttons on the straps or along the "V"...
Good luck and have fun reconning your clothing to make them the best they can be for you!