In a move reminiscent of their sudden video intro teaser exactly a week ago, SM Entertainment has unleashed another surprise on us, with an unannounced release of a 40s teaser for their Lachata music video. Check out the hot teaser which shows us close-ups of their pretty faces and also a feel of their Lachata title song. The full MV will be released on 2nd September. That's not all, here's the full song leaked a day before release. credit: LizHae