Hummer: Robyn and Yelle cover each other

What's better than one European pop star? Two European pop stars. And what's better than two European pop stars? Two European pop stars swapping songs -- which is exactly what French chanteuse Yelle and Swede Robyn recently did for a little collaboration they're calling Foreign Exchange.

Here's Yelle covering Robyn's "Who's That Girl" now titled "Qui Est Cette Fille?":

And here's Robyn returning the favor with her version of Yelle's "A Cause des Garcons" now titled "Because of Boys" (with a tasty dab of the Swede's "Cobrastyle"):

Previously > Pink's "Funhouse"