Right now the most-sung songs on this chart are Warrior of the Mind (Cast of EPIC: The Musical), Nie, niełatwo (Seweryn Krajewski), I Know That My Redeemer Liveth (From Messiah) (Various). Ranked by real karaoke plays on Singa and refreshed daily.
Updated
The oldest song on the chart is Take A Pair Of Sparkling Eyes (The Gondoliers), from 1900.