Composer Rajesh Roshan is full of praise of Kangna for hitting the right notes in the movie, in which she plays a negative chracter.
"Kangna is a born artist. There are praises for her from me. She has sung such a tough song in the film... to sing such a song, a full-fledged romantic song, it is a big thing," Rajesh said.
Talking about the music of the supehero film, which stars Hrithik Roshan in the lead role, he said that it was tough as his director-brother Rakesh had set high standards.
"It is an action film, Rakeshji is Roshan blood, if you give him only commercial, he does not take it. He has fixed standards. They make me work till I raise my bar," he said.
The composer also added that one song took about a month to be made and five to six days to mix.
In addition to the romantic track, one can even groove to an item song, which Rajesh says is sans vulgar lyrics.
"Sameer has written the songs. This is a commercial film and there has to be a balance in the lyrics... There is an item song, but it does not have bad words. Rakesh doesn't like to put words just so that it works," he said.
'Krrish 3' also stars Priyanka Chopra, Vivek Oberoi. It is scheduled for a November 4 release.