Here at The Pleasant Times offices, we frequently suffer from The Quebe Effect. That is where someone starts a tune-- maybe just a couple measures-- of one of the songs that the Quebe Sisters sing, and that is all it takes for it to take over everyone's brain. Nothing will stop it but another dose of the Quebes on youtube or itunes.
This has happened to us with other tunes/singers as well, but we have never had a name for this effect before. Since it has been happening so often with this particular group, we will name it in their honor.
Here's another dose of the Quebes, just in case it's been happening to you, too: