"The X Factor" Top 10 Show that aired on Wednesday, Nov. 21 featured the acts singing dedication songs to those who have impacted their lives most in the spirit of Thanksgiving.

The highlight of the night came from the season's two youngest singers, Diamond White and Carly Rose Sonenclar, both 13.

Kim Kardashian and boyfriend Kanye West, her stepfather Bruce Jenner, and sisters Kylie and Kendall Jenner were in the audience to support sibling Khloe Kardashian Odom on her hosting duties.

Khloe was stunning in a formfitting white dress with loose flowing wavy hairstyle. She was confident and it showed. So confident that when Ryan Seacrest told her to sit on Simon Cowell's lap, Kardashian followed suit. The stunned show creator replied, "This is quite difficult, but I'm enjoying it," said Cowell.

After White shared that she dedicated her song to her mother for raising the pre-teen as a single parent, she performed an emotional rendition of Celine Dion's "Because You Loved Me."

The song was so heartfelt, that not only did her mother cry, but Demi Lovato and Britney Spears did as well as; all four judges stood up to give White a standing ovation.

"You've never had a moment like that, baby...You are the truth!" said L.A. Reid. "You've had many amazing moments on that stage but you've never had a moment like that, baby." Reid added. "Unless I'm dead wrong, we're gonna be hearing your name for many, many years. You are the truth."

Lovato, in tears, admitted she was "blown away." She confessed that the ballad meant a lot to her saying, "and the fact that you just gave your heart and soul to it, I'm blown away."

"You were both fearless and incredible," Cowell chimed. He then noted that the 13-year-old is "singing better than 30-, 40-years-olds we've worked with on these shows."

Spears simply called the performance "really beautiful," adding that White's story "just broke my heart."

Later, Carly Rose Sonenclar sang "Somewhere Over the Rainbow," which was dedicated to her brother Russell. The cover also brought the house down and brought the judges to their feet.

"Carly Rose, wow, girl. You are an absolute force of nature," said L.A. Reid.

"You're an alien or something but that's okay because I love aliens," said Lovato.

"You are the best alien I've ever heard sing in my life," joked Cowell while standing for his ovation. "I've heard that song a lot of times. That was one of the best versions of it I've ever heard."

The British mogul then retracted his previous comment that he considered contestant Vino Alan to be the frontrunner on the results show. "I think I've changed my mind," Cowell said to Sonenclar. "I think you've blown this competition way open."

L.A. Reid called Sonenclar "an absolute force of nature," and for the second week in a row, Lovato commented on the talented singer's age.

"I need to see like a school ID or something because I really, honestly don't believe you when you say you're 13," Lovato joked. "You're just amazing and you're going to be around in this music industry for the rest of your life."

Spears, Sonenclar's mentor, added: "I agree with everyone. I will never get over the fact that you're 13. It's unreal."

Tune in Thursday, Nov. 22 at 8/7c on FOX to see Cher Lloyd perform and to find out not, one but TWO acts head home for the Top 8 Results.

Watch Diamond White perform Celine Dion's "Because You Love Me" in the video here

Watch Carly Rose Sonenclar perform "Somewhere Over The Rainbow" in the video below

Tags: The X Factor USA The X Factor fox Demi Lovato Britney Spears Simon Cowell L.A. Reid