It would seem that this one is a little hairy for folks to solve. Besides a bad associative pun in my first sentence, another clue is that the fifth image has, but isn't about, flowers - but the song in question DOES mention them.
The only reason I got was because of your hints. The only band I knew that had "cow" in their title were The CowSulls and the only song I knew of theirs was " Hair". Dr Google helped me guess the song!
Micron, you can click on each one and see it in expanded format if you were in doubt. Your magnifying glass is your mouse.
My clue about "Hair" was of course because they did a version of that song as well. The pictures were of Rain, a Park, and a busy scene of a guy in a room with a lot of Things. The Cow was obvious and the flower vase was on a window sill.