"The experience was great. I have already recorded the song. Unfortunately I can't talk much about it. But it's in the process and will be out very soon, " Sunidhi told in an interview.
She and Enrique sang "I Can Feel You", which has both Hindi and English lyrics. Sunidhi has also shot for a video with the Spanish singer for the song that is slated to be out this month.
The 27-year-old Indian singer has belted out chartbuster songs like "Ruki ruki" ("Mast"), "Dhoom machale" ("Dhoom"), "Deedar de" ("Dus"), "Beedi" ("Omkara"), "Sajnaji vari vari" ("Honeymoon Travels Pvt. Ltd."), "Chor bazari" ("Love Aaj Kal") and most recently "Sheila Ki Jawani" ("Tees Maar Khan").
Asked if she found any difference while recording a song internationally and when in India, Sunidhi, who wants to collaborate with singer Mariah Carey someday, said: "There is not much difference."
"The difference is in the song and the atmosphere. It's a nice experience. But when it comes to singing, it's all the same, " she added.
Sunidhi has been in Bollywood for more than a decade now, but the entry of new singers in the industry doesn't scare her. She believes that being good at work is the survival tactic.
"It's not tough to survive in the industry. You just have to sing better than everyone else and you survive. It's a simple equation. You give your 100 percent time and discipline, and work so hard that people see and appreciate, " she said.
"As long as you know that working hard is the mantra, you will not find it hard to survive in the industry, " she added.
The singer made her debut as a reality show judge in "Indian Idol" last year.
So any plans of taking up acting like Sonu Nigam and Himesh Reshammiya?
"I did TV, I've done a couple of videos and I'm quite happy with that. When it comes to acting, I believe that unless I'm sure of what I want to do, I don't get into it, " Sunidhi said.
"For acting, I still haven't got that inner voice. So I wouldn't like to go ahead with it now. But as soon as I feel I'm ready, I wont mind doing it, " she added.
"I believe in instincts, whatever my instinct says, I do that, " Sunidhi said.
And how does she feel when she looks back at her journey till now?
"To be really frank, I don't look back to analyse how the journey has been because I feel that the journey has begun now. It's not that I have done a lot in life. I need to do lot more. So I don't relate to that feeling of looking back."