Track will be exclusive to iTunes version of singer's new album
The singer flew to New York to meet the Velvet Underground frontman and "two minutes later he died"
The US singer-songwriter puts out her second album on June 16
The song comes from her forthcoming second album 'Ultraviolence'
Singer says her idea of a true feminist is 'a woman who feels free enough to do whatever she wants'
The singer refuted rumours that she was paid $2.8 million for the gig
Latest track from 'Ultraviolence' is previewed ahead of album's June 16 release
The singer performed the song at a gig in Vancouver
Seconf song from 'Ultraviolence' revealed
Her second album 'Ultraviolence' is set for release on June 16