Known for his quirky, full of life music, Khushi will be spinning the disc before Tiesto takes over at the event.
"I am excited yet nervous. Tiesto is like god of DJs and sharing the stage itself gives one goosebumps," Khushi told.
The 28-year-old has worked in Bollywood and given remix versions of "Chammak challo", "Chikni chameli" and "Matru ki Bijlee ka Mandola".
Tiesto is known for Electronic Dance Music (EDM), Trance and House and has performed with artists like Kanye West, Coldplay, Katy Perry, Nelly Furtado and Goldfrapp.
Khushi has prepared a special lineup of music for the big day.
"It's going along really well. I am working on special line up of music. Since thousands of fans will be there, I want the buildup to be very good. I will have my own remixes. There will be music numbers that I have specially made for the concert and it will be played there for the first time," he said.
After playing in Mumbai Friday, Tiesto will perform in Bangalore and Delhi on March 30 and March 31, respectively.