Holy cow. What a wonderful Friday themeless this one is. I was impressed by every aspect of the grid.
I broke into the puzzle with 1D: Jeremy of "Entourage" (PIVEN), a gimme for me, anyway. This led to the only answer I'm down on, EZINE. But then I broke the long acrosses. How great is it that all three of them end in -S, but are not actually plurals? They each require that S to work. 1A: Bedroom set piece? (PAJAMABOTTOMS) gets an A both for clue and answer.
I didn't know IMAGINEDRAGONS by their album name, but my daughter saw them last summer and has a T-shirt, so the answer came to me pretty quickly. VANESSAWILLIAMS is likewise great, with her full name represented.
I moved down the upper diagonal but couldn't break the SW corner yet. In the NE, SNAREDRUM (excellent) and STEVENS (also great) came fine, but I put in SMARTies (?!) at 15D: Little something for the road? I mean, yes, they are little, but why would they be specifically for the road? SMARTCAR came later, and I love love love that entry.
So I had to restart in the middle of the bottom section. From TRUSTS and TSHIRT, I got THONGS and TAMIL and STINK. This made TALKSNONSENSE apparent. Here's another amazing set of long answers. DATINGAGENCIES is a plural, but I have no issue with it at all. Even better is 53A: Extra sauce order? (MAKEMINEADOUBLE). Hah! I love it.
There are a slew of 3-letter answers necessary to make all of this work. But look at the clues and how they make it fun to get them. 6D: Puzzle hunt?: Abbr. (ANS). 12D: "J'accuse!" reply (MOI). 56D: Place of corruption (DEN).
Two big thumbs up.