Asa Singh Mastana was a Punjabi musician and singer best known for lending his voice to the bollywood movie dooj ka chand and singing jugni and Heer-genre of folk songs, which recount the tales of Heer Ranjha by poet Waris Shah. He became popular in the 1940s, by the mid-1960s, when state-run All India Radio started promoting folk musicians, this made him, along with Surinder Kaur, Pushpa Hans, Madan Bala Sidhu, Prakash Kaur, singers of cult status.
His well-known songs, such as "Balle Ni Panjaab Diye Sher Bachiye", "Doli Charhdeyan Marian Heer Cheekaan" and "Kali Teri Gut", have served as templates for later Punjabi musicians His work also expanded to singing sad songs like "Jadon Meri Arthi Utha Ke Chalan Ge". He was mostly paired with Surinder Kaur sang along with Pushpa Hans, Madan Bala Sidhu and many more versatile female singers of the time singing many old folk songs of Punjab.
In 1985, he was awarded the Padma Shri by the Government of India.