sheet envy

I finally decided on my new duvet cover this past fall, and I adore it, but now none of my sheets match.  I am of the opinion that one's sheets should not be boring.  Like underwear, they stay covered up most of the time (if you're a good little munchkin and make your bed), so why waste your time on serious, plain sheets?  Rita Konig's bed is my inspiration.  I love, love, love those hearts!

I couldn't find any exact matches, but here are a few options I like:

clockwise, from top left: arrowhead sheet set from anthro, novelty pastel sets by tommy hilfiger (I like the heart and scottie prints best), snowflakes sheet set from anthro, polka-dot sheet set from target