One-named singer with 2019 hit Without Me / TUE 5-11-21 / Twitter thumbs-up informally / Vehicles in some tabloid photos / Dew Drop historic New Orleans nightclub / 2012 Grammy winner for Channel Orange

Not sure why I decided to check the "L" cross on BIRTH CONTROL instead of heading back to the NW, but I'm really glad I did. Stumbling into the revealer like this absolutely maximized my delight. First of all, I just like LOW-KEY, all on its own, having nothing to do with the theme. It is a common enough adjective, but it feels fresh because the term has had something of a colloquial surge lately, both as an adjective and (more novelly) as an adverb (e.g. "I LOW-KEY hate him!"). "LOW-KEY" is featured in this incredibly stupidly-titled article, "24 phrases millennials use all the time but no one else gets." So I regular-key liked it. But then to look over, see ESCAPE and CONTROL, and not only grasp the theme immediately, but notice that LOW-KEY was crossing one of the very "keys" it was talking about—that the CONTROL "key" was in fact the key to my seeing LOW-KEY in the first place—all of this meant that the revealer landed in a way that very few revealers land: with a genuine, multi-layered aha moment: "oh ... Oh! ... OK, wow, cool." Thankfully, the rest of the puzzle was strong enough that I never lost the very good vibe created by my early LOW-KEY discovery.

The only let-down for me was FIRST SHIFT, which obviously, screamingly, should've been NIGHT SHIFT. The ghost of NIGHT SHIFT haunts this puzzle. It is the much much better, more vivid, more familiar phrase, and it is very angry that it got killed off. But if you try to swap FIRST for NIGHT, you will discover very quickly *why* it got killed off. If you tear everything out, back to STORAGE SPACE (which is a themer and thus can't be torn out), and then try to refill the grid with NIGHT SHIFT in place ... you can't. Well, you'd have to keep tearing, past BLACK SEA and all the way to god knows where. Because PESCI would become P-H-- and only PSHAW fits that pattern. And aside from being bad fill, PSHAW leaves you with -S-K where PERK now stands, and you can see how limited you are there, and so on and so on. Basically, FIRST SHIFT is disappointing relative to NIGHT SHIFT, but not half as disappointing as the grid itself would be had you tried to force NIGHT SHIFT to work. So you just make your peace with FIRST SHIFT and hope that NIGHT SHIFT doesn't seek revenge somehow.

The one problem I can see here, from an ordinary older-solver perspective, is the proper-noun crossing of HART and HALSEY. It's HALSEY who's gonna flummox a lot of people today. The majority of older solvers (a huge segment of the solving population) will not have heard of her. I don't know what I mean by "older" exactly, but let's just say I'm Gen X and barely know her. Or, rather, I know her name well enough, but only as a name. No context. No specifics. She's a popular singer. That's all I got. I can guarantee you that the majority of solvers older than I are going to have far less of a clue. Which is not a big deal, she's clearly famous enough to be in the puzzle, it's just that you've got to watch all of the crosses on her name. Now Kevin HART is much more famous (I think?) than HALSEY, so he's probably a fair cross for HALSEY's not-guessable "H"—but of the HALSEY crosses, HART is definitely the diciest, especially with a pretty bare-bones clue (47A: Stand-up comic Kevin). Crossing proper names is just dangerous. And when you cross two pop-culture names at a largely unguessable letter, you're definitely ruining someone's day somewhere. 

Again, both HALSEY and HART are plenty famous, and "H" is probably the best guess there if you are totally in the dark. Still, even though I knew both performers, that cross set off an alarm. You have to be careful when crossing names, especially when those names come from the same general ecosystem (here, contemporary popular entertainment). You don't want to leave *any* solvers hanging on a Tuesday. I haven't even mentioned FRANK OCEAN, who, like HALSEY, will be new to a sizable section of older-than-millennial solvers. His crosses all look fine, but if you've never heard of him before, you have my sympathy, especially since, if you don't know him, you almost certainly don't know HALSEY, which leaves you struggling for names twice. And on a Tuesday. Oh well. There have been tons of puzzles aimed at older solvers. Most of them, one might argue. A little correction is probably overdue.