She polled the largest number of viewers' votes through phone-ins and SMSes, some of which came all the way from Singapore.
There was no dearth of glamour in the Saturday evening finale as Prachi and her choreographer, Deepak, won the trophy and cash prize of Rs. 5 million in a nail-biting contest, beating finalists Sandhya Mridul and Jay Bhanushali.
The show was packed with entertainment for viewers, including those from the Gulf and Singapore, who had been following it for the last 13 weeks.
Special guests Bollywood stars Akshay Kumar and Katrina Kaif, did their bit to entertain viewers. The two, who will be seen together in romantic comedy "Welcome", gave away the prizes. Akshay sported a new jaw- line bearded look.
Although the three judges voted for Sandhya, Prachi, the youngest participant, was unanimously the winner.
Clad in a red tunic with silver leggings, Prachi was looking like an excited school kid. However, she controlled her excitement while the others were busy consoling Sandhya.
Prachi, seen as the sari-clad bahu of "Kkasam Se", surprised the entire nation with her dancing skills and became the favourite of the judges too.
A twist in the tale came when the public voted her out and she was eliminated from the show earlier on despite being the best performer.
However, she re-entered with the help of a wild card.
Not only that, Ekta Kapoor, a tough taskmaster, granted her just four days' break from "Kkasam Se" to prepare for the "Jhalak Dikhhla Jaa" finals.
Ekta, however, refused the same kindness to Jay, who plays the main lead in her serial "Kayamath".
Last-minute dramatic changes in the verdict are nothing new.
Last year, Shweta Salve was the judges' and the viewers' favourite and a sure-shot winner. But it was Mona Singh who walked away with the first prize.
Another last-minute change took place when Shweta was selected as the female anchor, but it was "Jassi Jaissi Koi Nahin" Mona Singh who showed up with Rohit Roy.
While Mona is still looking for her big break in Bollywood, Prachi has already got it. She has been signed opposite Farhan Akhtar for "Rock On".
For the grand finale, not only did the other nine eliminated couples perform, veteran star Jeetendra shook a leg too. The audience went berserk when he hit the dance floor and performed to some of his hit numbers.