The South Korean star smashed home the opener just before half-time and then provided a defence-splitting pass for Nacer Chadli to convert the key second goal.
Sonny weighed in with almost 80% of over 16,000 votes cast on Twitter, Facebook and the Match Centre.
That was his first FA Cup goal - and we'll now travel to Colchester United in the fourth round on Saturday week, January 30, kick-off 12.45pm.
MAN OF THE MATCH RESULT - LEICESTER FA CUP REPLAY
Heung-Min Son - 78.76%
Christian Eriksen - 10.28%
Kevin Wimmer - 6.61%
Tom Carroll - 4.35%
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