The Kia hamsters are back, as promised, for the fourth installment of their series of ads for the 2013 Kia Soul. Set inside of an 18th-century opera house, the ad has the dancing hamsters getting busy to the tune of Axwell's remix of "In My Mind" by Ivan Gough. The series of ads has apparently helped increase the car company's sales by 78 percent since 2008. Check out the ad in it's entirety above.

[via YouTube]