Jessica Simpson was so nervous at a listening party for her new country music album, she warned guests she might vomit.

The singer performed all the tracks from new Lp Do You Know for 200 record industry figures at Nashville, Tennessee's Shermerhorn Symphony Center on Thursday.

After stepping onstage with a backing band comprising of three acoustic guitars, a bongo player and a fiddler, Simpson said, "Thank you so much for coming and for giving me a chance. I hope you get to experience what my heart's been going through the last few years.

"I'm a little nervous. If I throw up, I'm sorry."

When she made it through the gig, a relieved Simpson exclaimed, "I didn't throw up!"

Simpson's country debut Do You Know will hit stores in the U.S. next week.