For year the song "Dhoom Machale", a kind of anthem of the ‘Dhoom’ franchise, had been giving music lovers a musical adrenaline rush with its peppy rhythm. Now as ‘Dhoom:3’ is here to sweep audience off their feet, the pulse of the track is being heard yet again.

In the latest version the ravishing Katrina Kaif will be going Dhoom musically and will be seen performing on the song.

According to our sources, the latest track has been modified to be an extremely high energy number - So much so that Katrina underwent 6 weeks of rigorous training to learn and perfect the dance.

Even though Katrina is a fantastic dancer, she took that long to perfect the song. The actress was trained by well renowned choreographer, Vaibhavi Merchant.

We were told that there was a studio booked at YRF for 6 weeks for them practice the song. They had 4-6 hours of continuous training sessions every day. Even though the steps were tough, Katrina had to look at ease doing it.

The actress had a hard core training session improving her flexibility, increasing her strength and catching the correct attitude for the song. Also understanding the musicality and getting the mood of the song was on top of Katrina's mind, while learning the dance. "Its nothing like we've seen Katrina doing before," sources stated.

When the song was finally shot, Katrina did it is beautifully; earning umpteenth accolades from everyone on sets.

Earlier, Katrina similarly faced challenge when she had to learn the "Chikni Chameli" song which had high-energy level dance steps.