Wheel Of Fortune: I'd Like To Buy A Vowel, Vanna...

I'm not sure if it's because I like to watch the wheel spin, or the fact that I'm pretty good at the game itself, but I love watching The Wheel of Fortune. When it's on TV, I grab the remote and hold on to it for dear life so no one changes the channel. Oh, did I mention that I like Vanna White, too?

Anyway, I know the answer to this puzzle already. However, just to make sure, I think I'll buy the letter U...

Anybody out there want to take a guess? If nobody gets the answer, I'll spill the beans later today.