This is a lovely Thursday puzzle. And it looks to me like the stars in the grid echo the placement of the stars in the referenced painting, where they are grouped largely on the left side, with one bright one in the upper right corner. Very nicely done.
I caught on quickly with CO* (One sharing the credits?), but didn't really know what to do with *NSYNC (Band with the 2000 11x platinum album "No Strings Attached") because I didn't remember that the name began with an asterisk. See also: Q*BERT and E*TRADE. I knew both answers immediately, but had forgotten about the asterisks. It wasn't until M*A*S*H (Show with the most-watched episode in scripted TV history) rezzed in that I finally caught on.
Fave clues:
Corner piece - CASTLE
Places for prongs - OUTLETS
Get on - AGE
Overall, a nice way to turn a STARCROSSED thing into something beautiful.
"AVEC beaucoup d'amour,"
TOMCAT