Aww … I love getting insight into a friend's life. Reading Erik's note gave me the warm fuzzies.

This music idiot actually knew some of these groups! The TEMPTATIONs! Diana Ross and the SUPREMEs!
The ... MIRACLEs? The CONTOURs? Some research shows that these are indeed pop groups of old. And popular as well. My music knowledge is so sad ...
SUPREME COURT CASE worked best for me since I knew the SUPREMEs, and what a colorful phrase. Perfect choice to kick off the puzzle.
MIRACLE MOP was also awesome-sounding — I want one RIGHT NOW even though I don't know what it is — but not knowing that group put a damper on it for me.
TEMPTATION ISLAND was the opposite. I love the TEMPTATIONs! Not so much, TEMPTATION ISLAND. It was some reality TV show?
And CONTOUR KIT ... it appears to be a thing. It's silly that one criterion I use is "does it have a Wikipedia article?" But I loves me some Wikipedia. Especially when people make things up. (Ask Doug Peterson about the Laughing Boy.) Don't judge me!
Solid execution, not a surprise from one of the best in the biz. It's not an envelope-pushing grid, but check out the work in the SE corner, the one place that would usually need crossword glue. ISLAND over MOTOWN is a rough business. Plenty of people would have fallen into the trap of moving the black squares above TAU to where TAU is, thinking it'd make their lives easier. Not so! Having that little three-letter space increases flexibility quite a bit.
And to work a music term, STEREO, right in there? Excellent!
Nothing huge in grid bonuses — I liked (but not loved) TRYOUTS, EXCERPT, TOPSPIN, EARACHE — but nothing huge in liabilities (ASST, ATO, LALA). I would have liked for Erik to challenge himself a bit more, perhaps working in a pair of long down in the SW / NE corners. Not sure how to do that though …
Not being much of a pop music guy, the theme didn't catch my attention. But what a delight to see the personal tie for Erik.