Yash Raj Films’ digital platform Y Films launched India’s first transgender band, the 6 Pack Band and released its first song “Hum Hain Happy”on Wedesday.

6-Pack Band comprises six transgenders singing original songs, including a cover version of Grammy-winner Pharrell Williams' hit "Happy".

Noted playback singer Sonu Nigam joined in to show support for the band.

The Bollywood star also lent his voice to one of the songs of the group. Sonu said he had a great experience singing with the band, something he wanted to do from a long time, reports The Times of India.

"We are taking one step at a time. There are total six songs. I felt very happy singing with them. They were singing my songs all the time, they have a very good vibe. I really enjoyed their innocence and child-like energy," the singer told reporters.

Bollywood actress Anushka Sharma also pitched in her voice at the begging of the song where she talks about how the transgender community is often ridiculed in Indian society.

The band has been curated by music-director Shamir Tandon, who said they chose the popular "Happy" song to launch the band as English songs have a wider reach.

"The idea was to transcend boundaries, so we thought instead of doing a Hindi song lets do an English one. They are always happy despite the fact that people abhor them, disrespect them. 'Happy', we hope, will be heard by every body."

Watch the video here: