Chennai: Legendary singer S.P. Balasubrahmanyam, who has received a legal notice from his long-time friend and maestro Ilayaraja which doesn't allow him to render the latter's songs during his ongoing tour, says he is ignorant of such legalities.

The National Award winning singer is currently on a world tour SPB50, to commemorate the legend's 50th year in the film industry. The tour started in August last year from Toronto, Canada.