There really is an app for everything -- David Archuleta just released his own app for iPods and iPhones. With his app, you can sing Christmas songs like "Have Yourself a Merry Little Christmas" and "Silent Night" along with the American Idol cutie. (The tunes are also on his new Christmas album Christmas From the Heart.)

The game has four difficulty levels to challenge your pitch and rhythm accuracy. There's also a special exclusive video tutorial with David giving singing tips!

You can download the app for $1.99 here.

Do you buy apps? What are some of your favorite apps?

Photo: Jason Imber