Nikki Bella signed to America's Got Talent

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When Nikki Bella first met Simon Cowell, she felt "very intimidated."

Prior to joining him on the judging panel for "America's Got Talent: Extreme," she used "concentration music" to relax.

She told PEOPLE: "I remember being intimidated on the way over.

"I'm listening to meditation music because I'm a new judge with Simon.

"I just wanted to give my all. He was really welcoming and down to earth from the moment I met him. He gave Travis and me great advice."

The 'Total Bellas' star said she was pleasantly pleased by the 62-year-old media mogul's softer side.

“It's "That surprised me. I was somewhat stunned. 'All right, let's do this,' I said, feeling at ease. But it started when I met Simon.

"He's a lot more talkative than I imagined. I've seen that even when Simon is critical, he really praises everyone's talent and guts on stage.

No matter if it's the home show or our show "AGT: Extreme," you can tell he loves everyone coming on stage and giving their all.

Nikki, 38, said she had "immediate chemistry" with the other judges and the spin-host, off's Terry Crews, onscreen.

said: "To be honest, I was initially intimidated. Then I learnt a lot from them and [anchor] Terry Crews.

"I had fun. I cried. But it was a great moment to be there.

"I mean, Travis is the king of extreme, and Simon Cowell is the legendary judge."

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