Great idea: have two electropop-divas cover each others song. iTunes initiated it, and they chose Robyn and Yelle to for this Foreign Exchange project. Yelle made a little more effort than her Swedish counterpart - the beat for Robyn's version of Because of Boys (her translation of A Cause des Garçons, that was a cover already, see here) was used for her song Cobra Style.
Who would you like to exchange songs?
Yelle - Qui est cette fille (original here)
Robyn - Because of boys (Yelle's version here)