Kirtan or Kirtana is the call-and-response chanting performed in yoga’s devotional traditions.

Traditional kirtan practice involves chanting hymns or mantras to the accompaniment of instruments such as the harmonium, tablas, the two-headed mrdanga or pakawaj drum, and karatal hand cymbals. Contemporary versions of kirtan performed by westerners incorporate many other types of instruments and create fusion-type musical kirtan collaborations.

Dave Stringer
http://www.youtube.com/watch?v=pceY9jIVh7Y
Jai Uttal
http://www.youtube.com/watch?v=rFEFxrb_yJ8
Krishna Das
http://www.youtube.com/watch?v=EWcSTABEiRA&list=UUtzvMbKEud7MqkIVdFjfHXQ&index=18&feature=plcp
Tina Malai & GuruGanesha
http://www.youtube.com/watch?v=6wbqYOKPi3Y