"[11] The mantra is repeated, either sung out loud (bhajan), congregationally (kirtan), or to oneself aloud or mentally on prayer beads made of tulasi (japa).[13] In this Upanishad, Narada is instructed by Brahma (in the translation of K. N. Aiyar): Hearken to that which all Shrutis (the Vedas) keep secret and hidden, through which one may cross the Saṃsāra (mundane existence) of Kali.[1] Emic tradition claims that the mantra was popularized by Chaitanya Mahaprabhu roughly around 1500 A.D. when he began his mission to spread Harinam publicly to "every town and village" in the world, traveling throughout India, and especially within the areas of Bengal and Odisha.Beginning in New York City 1965, he encircled the globe fourteen times in the final eleven years of his life, thus making 'Hare Krishna' a well-known phrase in many parts of the world.The single was a commercial success, peaking at number 12 in the UK, and led to the Temple devotees appearing on the popular British music chart television programme Top of the Pops.[citation needed] Less well-known recordings of the Hare Krishna mantra include versions by the Fugs on their 1968 album Tenderness Junction (featuring poet Allen Ginsberg), by Nina Hagen, in multiple songs by English psychedelic rock band Quintessence (produced by John Barham, a frequent collaborator of George Harrison) and by Hüsker Dü on their 1984 album Zen Arcade.