United Kingdom, March 31 -- Jessica Simpson believes snake sperm has improved her singing.

The 44-year-old singer-and-actress' vocal coach recommended she started drinking a "Chinese herb thing" and she revealed the special beverage has some very unconventional ingredients - but she thinks she's experiencing the benefits.

In a video shared to Instagram, in which Jessica drank the solution in front of her band, she said: "They're like, 'What are you drinking?' Because it's this Chinese herb thing.

"And I'm like, 'I don't know.' My vocal coach told me to drink it, and they Googled the ingredients and - snake sperm. It's like a honey.

"So, if you want a good vocal, you gotta drink snake sperm."

The 'Dukes of Hazard' star captioned the p...