Reaction videos without copyright?

Hello world,
I want to start a youtube channel where I'm doing reaction videos of new songs,i see a lot people doing it,but i was wondering how can they still monetize there videos and not get any copyright issues
.Some people have +Millions of followers mainly with reactions videos like Dj Ghost.
How can they bypass the copyright issues,is it legal or is it just a bubble?
Thanks

Following.. i also need the answer

They can't. All the revenue of the songs will go to the owner of those songs. They are wasting their time doing reaction videos.

ARE YOU SURE ABOUT WHAT YOU'RE SAYING? Cuz i don't think people with hundreds of videos and thousands of followers are that stupid.

Reaction videos - you can use copyrighted materials. Ensure your face is there, you re talking, reacting.
Under fair use law, a copyright owner cannot claim copyright or have your channel striked for doing a reaction because a reaction video is considered 'criticism,' coulld be 'news' could be education, whatever, but you re covered by fair use, and you CAN monetise the videos. Some copyright owners can act crazy but if you know the law, you will win amnd youtube wont strike your channel for reaction on a copyright material.