Listen to Ek Din Aap online. Ek Din Aap is a Hindi language song and is sung by Jatin-Lalit, Kumar Sanu and Alka Yagnik. Ek Din Aap, from the album Bollywood's Best Couples - Vol. 1, was released in the year 2013. The duration of the song is 4:28. Download Hindi songs online from JioSaavn.