'M! Countdown Begins' airs MV and rehearsal BTS footage for EXO's 'Overdose'

http://www.youtube.com/watch?v=iDGYg0x8ZOw

Mnet's 'M! Countdown Begins' revealed BTS for the handsome boys of EXO and their latest hit, "Overdose"!  The show visited the MV set where the boys looked charismatic on camera and broke into smiles off camera, not to mention the mischievous Lay had fun poking people on the shoulder before quickly running away to his targets' confusion. 

The show also went backstage to meet EXO-K during their rehearsal for music program, 'M! Countdown.'  Check out both videos!

http://www.youtube.com/watch?v=IMMvgmPlc00