Are random mood swings normal?

Okay so before I begin, I would be thankful for anyone to answer my "Dizzyness" Question on my profile, it for some reason, didn't update to the recently asked questions on the front page and no one saw it. KayTHANKS=)

Anyways. I have really random mood swings.

Like sometimes I'll be sitting at the computer and all of a sudden I'll think I'm a little girl, and prance around the house pretending I'm a fairy, or saying I want to be a fairy or ballerina or something weird.

Also, I'll be like.. mature. I'll do all my work PROPERLY, watch adult tv shows (The News, not p*rn.), and when I'm talking to my friends about stuff, I'll take control, and act all leaderish.

Then theres the times when I'll be just a teenager. Being normal, talking about stupid things that im too young to do, (drinking etc), and being all hyper & bubbly.

ALSOOO. I have the sad days where I'll just be all meloncholy.

For an example;
Yesterday I had gone to the sushi train and I was talking to my dad about politics and stuff (Cause John Howard is OUT of office, BOOYEAH!). as we were driving home. We drove past this garden thing with all these roses.

I have no idea what happened to me but I stopped mid sentence, pointed out the window and said "Look at all the roses! Theres so many pretty flowers"

Is this normal or am I just going crazy? And if this made no sense whatsoever im sorry. try your best to understand, im kinda braindead right now. XD

Urg.
So many spelling errors.
Must edit.

I have random mood swings, it is especially normal for me, and a lot of people at my school are the same. It's perfectly normal, so don't worry about it!
Britz