When it comes to creating niche sites it is important to write about a niche you love or even better write about your own experiences. Besides these two there are actually another alternative where you get someone else to create the content and maintain your niche site for free.
How it works
It is all about finding the right people. Instead of advertising for people to create content for niche sites you decide on a topic within your niche and register a domain. Then you contact people who writes about this topic and ask them if they would like you to create a site for them on your domain.
If you have a network with niche sites about celebrities you can simply visit WordPress.com or a forum like FanForum.com and try to find people who writes a lot about one specific celebrity. In this case Allison Scagliotti.
Then you register a good domain, if possible the name of the celebrity. If that is not possible just add fan or fansite. As soon as you have the domain registered and paid for you should contact everyone you found interesting and tell them that you own this domain and are trying to create a fan site about this specific celebrity. Since the person you contacted wrote a lot about her, she might be interested in writing on the site together with you.
As soon as you have one or more people interested you install WordPress and hook them up with a user account. Help them in the beginning by creating a few posts and have regular contact with them.
After a while when you have some visitors you add advertising and offer to pay her or him a share of it so they will make money of their work. By doing so you will have a growing income without spending a minute on it.
What to think about
Remember there is a difference between helping people without any knowledge about WordPress and taking advantage of them. Make sure they get something in return for all their hard work.
Since it could be difficult to pay salary because of several reasons a good idea for both of you are to have your own advertising. Convince them to register on Google AdSense and then show your ads half of the times and their ads half of the times. By doing so you will truly share the income even.