Can pink live happily with Red, White, and Blue decor or will the colors fight each other? I think they can "marry" IF you choose the right shades of color on both sides!
The pink can't be a hot pink, it works better with red if it's a softer shade of pink. The red needs to be kind of a maroon-ish red if you want it to play nicely with pink.
I have to admit it takes a little hunting to find the right shades you need and a lot of the time I wind up making what I need. Several years ago I made a Patriotic rag flag and it has made an appearance in my decorating every year since.
Dark bright blue doesn't work well with pink.....a soft muted blue is what you will need to find.
I always try to fit in some kind of whimsical piece when creating vignettes. An old Dr Pepper wheel barrow with white boots in it was just what I was looking for to fit the bill.