If you like to hum along to your favorite tunes, you might want to pop by the iTunes App Store and download Let’s Sing, a new iPhone game that’s the creation of Lex Friedman and Marco Tabini. It’s available for free with an ad-supported version, or $4.99 if you prefer your gaming ad-free.

The game “combines the fun of karaoke or singing in the shower with Name That Tune.” OMGPOP’s Draw Something is another obvious inspiration. You’re given the choice between three different songs to whistle, hum, or “la-la-la” your way through (you can’t use the actual lyrics, though). The player on the receiving end has to guess the name of that song; if you’re both successful, you’re rewarded with gold coins which you can spend to reveal hints when you get stuck.

Let’s Sing works with the iPhone 3GS and later; it runs on the iPad as well, of course, but not as a universal app. An iPad-native version is coming and will be a free upgrade, according to the developers.