I realized that there were so many ways to put your own spin on the item - and isn't that what it's all about? If you do it right, the "trendiness" of the individual piece kind of disappears and it's all about the look as a whole.
So with joy, I bring you the blues:

A few places to get it here:

Left to right:
1. Miss Selfridge short sleeve, long length U.K. 40 (if you wonder why I always include this store - they ship to the U.S. for very low shipping fee).
2. Top Shop long sleeve, long length, $60
3. Current Elliot chambray nightshirt, $215
4. Antipodium dress, $269
Photo credits (left to right): The Sartorialist, Haute Pursuit, Keep Feeling Fascination, Garance Doré My Daily Style (now defunct blog), Punky B.