Sam made Steve a mixtape

[caedesdeo.livejournal.com]

I'm sure I've read in a story somewhere that Steve recognised/was humming along with a song and when asked how he knew it, it came out that Sam had made him a breakup mixtape/playlist for the fall of Shield, and whoever he was talking to (Natasha or Tony?) wondered what you'd include in a mix for breaking up with a clandestine government agency.

I know this is super vague, but does it ring any bells with anybody?

Found: Executive Party by Copperbadge