Mumbai, Dec 5 (IANS): Filmmaker Vidhu Vinod Chopra, who has written the lyrics of a song titled "Tere bin" for his forthcoming production venture “Wazir”, feels that Sonu Nigam and Shreya Ghoshal are the best singers in the industry.

"I genuinely believe that these two are the best singers in the industry. I don't have any doubt in that and I don't have any hesitation in saying so. I have a long relationship with these two," said Chopra.

He recalled that once "we made Sonu sing six or eight times, and so, he got upset. I suggested we make the room completely dark. He sang the song in the dark and when we turned the lights on, he had tears in his eyes," said the "1942: A Love Story" director.

For Chopra's films, the duo have sung popular songs such as "Zoobi doobi" and "Pal pal har pal".

They've again joined hands for "Tere bin".

"Audiences always want that more songs of this combination come out. We're fortunate that our voices are really loved together. I look forward to singing with him. I'm very junior to him and know him since he was in 'Sa Re Ga Ma Pa' and I was a contestant.

"I have looked up to him as a singer and today I get to sing such beautiful songs with him. Every song is a learning experience," Ghoshal said.

Nigam also believes that Ghoshal is "one singer who complements me really well".

"The best quality about her is that the expressions come perfectly along with mannerisms. If there'll be best all-time singers, Shreya will surely be included in that. She is very special to me," he said.