A great way of getting more followers is to host a give away or competition.
If you are having a good blog, you can proberly have somebody to sponsor your competition. They will for sure do it to promote a produkt or their name, so it have to be a sponsored by somebody having relevant products for the people who will read your blog.
As im focusing this blog on how to earn Money on a beauty/fashion blog, i can recommend to ask a shop that sell clothes or make up. Mabey you have earlyer recommended a product you like, and can make a shop sponser that product for your give away or competition.
To make your competition you can use Rafflecopter, i think it is very easy to use, and have alot of options.