Janin Devi chants the mantra "Govinda Hare" from the Yoga Vidya Kirtanheft No 182. If you should have just not Kirtanheft at hand, here is the text for you:
Govinda Hare Gopala Hare
Hey Prabhu Deena Dayala Hare
More mantras can be found in our mantra podcast http://www.yoga-vidya.de/de/service/blog/category/podcast/mantra/ We wish you joy and contemplation at listening and singing Govinda Hare with Janin Devi.