Planning to see the "Disney Hannah Montana and Miley Cyrus Best of Both Worlds Concert" in 3-D on the television? That's great.

WAL-MART IS RUNNING OUT

But if you haven't got your 3-D glasses yet, I'm afraid I have a spot of bad news for you. The Wal-Marts are running out of the free 3-D glasses. But don't panic, keep reading.

Two days ago, I stopped by my local Wal-Mart, and noticed their free Hannah Montana 3-D glasses display was empty. I thought perhaps they were keeping their stock in reserve, so I asked the store manager when he planned to put more glasses out. (I hasten to add that I didn't want to take any more for myself, I just needed to know so I could report on this.) He told me: never! The Hannah glasses were already gone, and they would not be getting any more.

I wasn't terribly concerned. Just because one store had run out, it didn't necessarily mean that the national supply of Hannah Montana glasses was in jeopardy. But then I read, on the 3-D Revolution blog, that Disney only distributed a paltry one million pairs of free glasses for this promotion!

A million? It might sound like a large number, but there are about 4,000 Wal-Mart stores in the United States. If that figure is correct, that means, on average, each store had about 250 pairs of Hannah glasses to offer. So, if you don't have your free Hannah Montana 3-D glasses yet, I would estimate your odds of finding them at your local Wal-Mart today to be about zero.

[CORRECTION: I have subsequently learned that Disney really gave away 25 million pairs of the glasses through Wal-Mart, not 1 million as "3D Revolution" wrongly reported.]

AN IMPORTANT WARNING

The good news is, you can still make your own 3-D glasses in time for the concert. But I'm begging you, girls, please, please, do not use Sharpie markers and plastic wrap for the lenses, the way the Starz channel instructs you to do! The colors will be uneven and will not filter properly; the plastic will wrinkle and pucker; the concert will stink. And for days afterward, you will look like this:

So instead of that stupid markers idea, at least run out to Hobby Lobby or some other craft store, and get yourself some real red and blue cellophane or acetate. Use that for the lenses. Please.

UPDATE: TV Guide to the rescue! The current issue of TV Guide, with Miley Cyrus on the cover, comes with a free pair of Hannah Montana 3D glasses.