NATCHEZ — Singing onstage at the House of Blues with Kenny Chesney, Reese Witherspoon, Matthew McConaughey and Drew Brees sounds like something out of a dream — and for Olivia Bridewell, it was.

But May 17, it was also a reality for the 22-year-old Natchez native.

“This has been a life-long dream for me, and it’s a dream come true, but for the last week I have felt like I was trying to wake up,” Bridewell said.

Bridewell didn’t know she would end up onstage after a bidding war with Witherspoon — the actress known for such movies as “Legally Blonde” and “Walk the Line” — when she decided to buy tickets to a joint fundraising concert for the New Orleans Saints quarterback’s charity, the Brees Dream Foundation, and McConaughey’s Just Keep Living Foundation.

She just thought she was going to see her favorite musician play live.

“I got an email from Kenny’s fan club saying they were going to have this small, intimate venue, and I really wanted to go,” she said.

“Kenny has been my role model since I was in the fifth grade, and his music was the reason I went to Nashville to study music at Belmont University for a year.”

Once she got to the event, Bridewell learned she could bid to sing onstage with Chesney, and she knew she had to do it. In Nashville, she’d known members of Chesney’s sound crew, but she’d never had a chance to meet him herself.

The bidding started at $3,000. It — there’s no other way to say it — escalated, until Bridewell and Witherspoon were the only two left. At $24,000, McConaughey and Brees declared the auction a tie and said both could take the stage with the “She Thinks My Tractor’s Sexy” singer.

“At one point, I looked up at Reese, who was on the second floor, and I said, ‘Reese, stop it,’” Bridewell said.

But despite having been on the opposite side of a bidding war, Bridewell said she and Witherspoon got along great while the stage was prepped for the performance.

“Reese and I bonded right away,” she said. “I told her I had watched one of her movies, ‘Just Like Heaven,’ just the day before.”

The two didn’t agree on what they would sing with Chesney right away, Bridewell said.

“Reese really wanted to sing a Kid Rock song, and then she said, ‘Why don’t we do something from (the musical) ‘Wicked’?’” Bridewell said. “I said, ‘No, we’re singing with Kenny Chesney, I want to sing a Kenny Chesney song.’”

When they took to the stage, they decided to sing Chesney’s “Summertime.”

“When we took the stage, Reese really stepped back and let me upstage her,” Bridewell said.

While the trio was singing, McConaughey and Brees joined them on stage and Chesney pulled Bridewell’s mother — Sue Pate — on stage to dance. After a few minutes dancing, McConaughey helped Pate down from the stage.

While Pate admits to being a little embarrassed by being pulled onto the stage, she said she’s happy her daughter got to perform.

“It was so exciting to see her up there with Kenny Chesney, because he has been so important in her life,” Pate said.

Video footage of the performance has since been shown on media venues owned by TMZ and E-Entertainment.

Bridewell said she was grateful to have had a chance to meet and get to know everyone she did.

But she’s thankful for her step-father, Mac Pate’s, willingness to be a philanthropist and bankroll the experience, Bridewell said.

“I am very blessed and grateful to have him in my life,” she said.