Good news - Celebrityville and Sleb: Tigress of Celebrityville are now both available through Smashwords! Follow this link - http://www.smashwords.com/books/byseries/19591 - to check them out for yourself. What's more, you can download "Celebrityville" to your preferred device for FREE!
They're both available via Smashwords' Premium Catalog, which means you can get your copy from Apple iBooks, Barnes & Noble, Scribd, Oyster, Kobo, OverDrive, Flipkart, Baker & Taylor (Blio, Axis360), Page Foundry (e.g. Inktera.com, Versent.com, Android eBook Store).
Additionally, via Kobo, you can access this book at WH Smith (UK), FNAC (France, Portugal), Livraria Cultura (Brazil), Angus & Robertson (Australia), Bookworld (Australia), Indigo (Canada), Collins (Australia), Feltrinelli (Italy), Paper Plus (New Zealand), Play (UK), Rakuten (Japan), as well as Buy.com (now Rakuten, US).
N.B. If you don't see them on one of these services yet then please give it time as it can take a little while before they'll find their way into their respective systems.