AHH! Camera crisis! Haha?

Hi, so I currently have a Nikon P100. I have mastered it and need a more professional one! If I have the P100, what would be the next step up for a new camera? You might say it depends on my ability. I'm VERY good, If that helps at all. I'll link my photography page if you'd like to see my ability-
https://www.facebook.com/...2719357623

Next, I'd like to know- should I switch to a Canon! Which is better in your opinion. I'd like to take pictures like Shawni Pothier. She's my photography inspiration. Would a Canon or Nikon give me results similar to hers? Should I do the big switch?

So you have "mastered" your P&S camera, I assume you mean you want to upgrade to a DSLR?

Generally speaking - Canon VS Nikon

Both brands are fantastic - brand loyalty attests to that. Every Canon owner will tell you to buy Canon, every Nikon owner will tell you to buy Nikon. That alone tells you that they are both doing it right, being able to keep their customers happy.

Both companies are very similar, but each have a few little details that are slightly better than the other.
Really, it comes down to personal preference. Narrow it down to a couple of models, then go to a store where you can hold them both.

Think about friends and family - if you can borrow someone's lenses and/or learn from their experience, it may be worth going with their brand.

You won't go wrong with either one (says the Canon girl who loves her Canons ;-)
Whichever one you decide to buy, you will "grow into" that camera, so the camera is the least of your (purchasing) worries. Always keep in mind that buying good lenses is more important than your choice of body and be aware that you will have MANY other expenses as well, such as flash, tripod, spare battery, bag, etc etc etc.
Make sure to do a LOT of learning and research before you spend money on a DSLR - if you don't know exactly what you're doing, you'll most likely regret many of your purchasing decisions a few months later.
Then once you have it, do loads more learning so you make the most out of your lovely new gear - no point having a great camera sitting on "Auto".

Neither Canon nor Nikon nor any other camera under the sun will guarantee you to get "results similar to so-and-so".It is totally up to YOU to learn your tool and the principles of photography in order to achieve the results you want.