There's certainly nothing new about this track, save for the fact that today was the first time that I heard it. Perhaps you'll find the same to be true for yourself!
"Adult Diversion" was released by Alvvays back in ~November of 2013. The track features Toronto-based Molly Rankin on vocals, providing a brit-pop tinged melody that's simple, easy to digest and refreshingly oldschool.
Seems like the perfect summer song, if you ask me.