The 70th birthday of playback singer P. Jayachandran was celebrated at the Sankarankulangara Devaswom Hall here on Monday. K.V. Ramanathan, writer and Jayachandran’s teacher, inaugurated the celebrations. Kathakali maestro Kalamandalam Gopi, actor Mala Aravindan, music directors M. K. Arjunan and Vidyadharan, and Kerala Sangeetha Nataka Akademi secretary P.V. Krishnan Nair were present.