When it comes to entertainment articles, it is important to think about the audience. Asking questions like who is your audience, where are they from, and what do they want out of the article will help you to format it well. Once you have the answers to those questions you can start to find some great entertaiment article ideas.
For example, if you know that there are some great karaoke bars in your area, writing an article about them would be great way to let people know of a fun night out. You could also discuss some of the best science fiction books that have been released recently to get readers excited about reading.
Lastly, the Oscars are always exciting and controversial so talking about them can be great entertainment article idea. You can also talk about some of the best memes of the year to make people laugh.