At the End of the Day, I am Comfortable in My Own Skin

Really?  Who were the first ones to trend these two phrases? And do the people mean that their skin feels good when they indicate such?  And are they referring to themselves as to how they actually are at the end of the day?  Are they comparing how they feel at the end of the day, or could it be late afternoon or even the beginning of the day?  I know right?

It is really interesting how catch phrases catch on.  Does this mean that we are really listening to one another, or are we just a bunch of copy cats?  Unfortunately, I think it is the latter of the two.