The $10 t-shirt deal of the day over at TeeFury today is a Dr Horrible’s Sing-Along Blog-themed shirt called “Sing Along with the Horrible Doctor” by artist joebot.

The sale began at Teefury today, Thursday, September 15, 2011, at midnight EST, and will continue for 24 hours from then, and once it’s over, it will not be sold on the site anymore.

A portion of the proceeds will be donated to “Club Mo” for the Los Angeles “Walk For Lupus Now.”

The t-shirt is available in men’s sizes in slate blue and women’s sizes in silver for $10 each.

Here’s what the artist had to say about the design:

It’s a brand new day so get ready to sing along with Dr. Horrible and Captain Hammer as they battle for Penny’s affection in their brand new debut album! You’ll be sick with joy over catchy songs such as “Wonderflonium” and “Crazy Random Happenstance”. With a guest appearance from The Thoroughbred of Sin himself, everyone’s a hero when they Sing-Along with Dr. Horrible!

What do you think of this design?