Most likely Alex Sensation. Just yesterday he was playing Rihanna's "We Found Love" along with other English songs.Strange. It was not a hit anywhere in Latin America; back in the 60's "Christmas trees" were pretty much unknown in that region and the holiday was Reyes (Three Kings Day) and not Christmas. Christmas was a religious date like Easter Sunday, but gifts were given on January 6th.
Very strange song to have played!