"Nobody can overlook this truth about Modi being India's most popular leader at this moment...There are no two opinions about it," the BJP president told Rajat Sharma in 'Aap Ki Adalat' on India TV.
At the same time, he said the BJP's Prime Ministerial candidate would be decided by its Central Parliamentary Board where even his "personal opinion alone" does not matter.
Singh pointed that there had been many communal riots during the rule of Congress chief ministers, but nobody talks about them.
He took potshot at Congress leader Rahul Gandhi, who recently remarked at a CII event that no person riding on a horse will come to power and solve problems of India.
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"The leader from the BJP, who will come to power in the next elections, will not come riding a horse. He will be a grassroot leader, who has worked for the last 30 to 35 years.
Rejecting reports about infighting in BJP over the issue of Prime Ministerial candidate, Singh claimed that it is the only political party which has "never vertically divided" unlike the Congress or the Communist Party.
"Even Atal ji and Advani ji were there. But they never hankered after posts. Had it been some other party, the party would have been vertically divided," the BJP President said.