Unlike the last time, though, when everyone was taken by surprise, there had been a fair bit of speculation about whether he would do it again.
He did not disappoint.
Like the last time, he apologised about being a terrible singer, before going on to solemnly sing the same two verses from the song he had sung on the earlier occasion, praying for brotherhood among people, asking them to be united against divisiveness and injustice.
The song that was originally sung by Manna Dey for the old Hindi film Paigham was written by Pradeep and is routinely used as a prayer at Aam Aadmi Party meetings.
The song from December 2013.
And as always, the Delhi chief minister polarised opinion. There were those who mocked the chief minister's singing.
CONGRATULATIONS TO ARVIND KEJRIWAL FOR BRINGING TOGETHER PEOPLE OF ALL FAITHS IN HATING HIS SINGING— Overrated Outcast (@over_rated) February 14, 2015
But many were approving.
Kejriwal is of course a besura singer, but I loved his school boyish involvement in the song! Speaks about his character.
— nikhil wagle (@waglenikhil) February 14, 2015
Great mood at Ramlila maidan. Glad to hear Kejriwal top up excellent speech with trademark song!
— Saba Naqvi (@_sabanaqvi) February 14, 2015
. @prashantojha Kejriwal's singing? Best I can say is "refreshingly goofy"!— Siddharth (@svaradarajan) February 14, 2015