App that gives you song titles after only humming a few notes?

I was watching Bones this evening and one of the characters on the show had an iPhone and said, "You know there's actually an app that gives you song titles, and all you have to do is hum a few notes." Does anyone know if such an app exists and if so what the name of it is?

jessica. said:

Midomi.

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Thanks Jessica, that has to be it.

jessica. said:

Not to ruin our one word answers but can shazam do humming?

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No, it cannot. I've tried.