Pink! So girly. I have 3 boys so I am always in awe of pink bedrooms, as you can imagine. I never had a pink room as a kid but how can you not love a bit of pink? I think it's even lovely when used sparingly, as in the second image. The harlequin/diamond shape adds a bit of edge and nicely elevates the space.
And? Yellow & pink are totally bff's. Obviously.