How effectively can you block "junk" out of your mind?

I have a great feeling after praying with our men's group remembering that Jesus rose to life, feeling refreshed spiritually.
How effectively can you block junk out of your mind?
10 minutes later at the grocery store, "Bad Medicine" by Bon Jovi is blasted into my ear. I try to cover my ears, but it repeats over and over and gets in..."Your love is like bad medicine, bad medicine is what I neeeeed... to cure my disease". Then it gets stuck in my head. Note: I like bon jovi, but I don't want to hear it when I feel good. It gets stuck in my head... Noise pollution! Isn't that vocal assault?

Not long after that I see the news, many people shot to pieces in NYC Subway. I made the choice to look. But I wish I hadn't. I can pray for them.
How effectively can you block junk out of your mind?
The "world" has a way of promoting what is not good for the heart...
Updates
+1 y
Not what I want to hear while shopping in "peace" at the grocery store:
https://www.youtube.com/watch?v=eOUtsybozjg
How effectively can you block "junk" out of your mind?
Post Opinion