The contestants of “The X Factor” are starting to really feel the pressure as they enter boot camp. Jennel Garcia and Jessica Espinoza stood out the most during Wednesday night’s episode, but for different reasons.

Sensing the tension during the second round of auditions, judge Britney Spears tweeted during the episode, “Awww can u imagine how nervous they felt singing in front of the other contestants... :( I can feel the tension on this side of the TV!”

Garcia, 18, first wowed the judges when she sang Grace Potter & the Nocturnals' “If I Was From Paris,” and she didn’t disappoint on Wednesday night in Miami.

The soft-spoken teenager turned up the heat when she sang her version of Gavin DeGraw’s “Sweeter,” and she practically had the judges eating out of her hand.

Judge L.A. Reid, a music producer and executive, leaned over in the middle of her audition to whisper to show creator Simon Cowell, “very spicy.”

“I’m feeling excited and nervous all at the same time because you never know what they are looking for,” Garcia said. “I don’t remember my first audition. It was like a dream.”

But Simon Cowell assured her that he remembered her doing “pretty well” her first time.

Demi Lovato loved the sensuality that Garcia brought to her new audition.

“Crazy sex appeal!” said Lovato.

Britney Spears tweeted during the episode, “Girl’s got soul! No fear in front of the other contestants - that's a pro. #SpicyGarcia”

Even though she was getting praise from the judges, Garcia was upset that her parents couldn’t be at the audition with her.

“I’m here by myself because I am an adult now,” said Garcia. “My parents couldn’t come with me. It’s the first time that I have been away from my parents. It’s hard, but it is time to grow up.”

Unfortunately for Jessica Espinoza, her boot camp audition did not go as well.

Even though the judges were in awe of her rendition of Pink’s “Nobody Knows,” they weren’t as impressed when she sang Whitney Houston’s “When You Believe.”

“You are one of the only people in this competition that I remember their first and last name,” said Lovato. But when Espinoza finished, Lovato turned to Cowell and said, “I’m pretty disappointed. She’s not as good as I remember.”

By the time she had finished singing the judges seemed confused with Espinoza’s performance, but she didn’t think it was too bad.

“I don’t want to go back home and tell my family I wasn’t good enough, or I didn’t try hard enough for you,” Espinoza said. “I don’t want to go home and disappoint anyone.”

Many “X Factor” viewers later tweeted that unless you’re Jessica Sanchez (a contestant last year) you shouldn’t try to sing a Whitney Houston song.