Simon Cowell shows off his mega white Hollywood smile as he arrives for America’s Got Talent quarterfinals

Simon Cowell showed off his Hollywood smile as he posed for photos ahead of the America’s Got Talent quarter-finals on Tuesday.

The 64-year-old music mogul appeared in high spirits ahead of the show, with judge Heidi Klum, 51, pressing the golden buzzer.

While posing on the red carpet, Simon took off his red glasses, which he wears to prevent migraines.

The former X Factor judge wore his signature style: a charcoal grey T-shirt and black trousers.

Heidi and Sofia Vergara, 52, strutted down the red carpet in glamorous outfits.

Simon looked ready to get the show started as he posed for a number of photos ahead of filming

The 64-year-old music mogul appeared in high spirits ahead of the show, with judge Heidi Klum, 51, pressing the golden buzzer

The supermodel stunned in a black leather strapless dress, while Sofia turned heads in a neon jumpsuit.

On Tuesday’s show, Heidi pressed her Golden Buzzer for Dee Dee Simon, a San Quentin prison nurse turned singer.

Dee Dee, a native of Oakland, California, worked as a nurse at San Quentin for 19 years and amazed the jury and audience with her powerful voice.

Before taking the stage, Dee Dee talked about how the prison situation has changed since she joined the show.

“When you drive through the gates, there’s a no-hostage policy,” Dee Dee said. “You know if you go in, you might not get out. When the inmates saw I was on AGT, it was like the Super Bowl was on.”

Dee Dee said her mother always told her to follow her dream. She sang Teddy Swims’ Lose Control and even kicked off her shoes during her performance.

“You just went for it,” Simon said. “I love that moment when you take your shoes off and you step it up a notch.”

“That was amazing,” Sofia said. “You’re a star tonight.”

The former X Factor judge wore his signature style: a charcoal grey T-shirt and black trousers

While posing on the red carpet, Simon wore red glasses that he uses to prevent migraines

Heidi and Sofia Vergara, 52, strutted down the red carpet in glamorous outfits. The supermodel dazzled in a strapless black leather dress, while Sofia dazzled in a neon jumpsuit

Heidi Hit Her Golden Buzzer for San Quentin Prison Nurse Turned Singer Dee Dee Simon

Dee Dee, from Oakland, California, who worked as a nurse at San Quentin for 19 years, stunned the jury and audience with her powerful voice

“The range, the tone of your voice,” Heidi said. “You look so beautiful tonight, but I feel like there’s something missing. Like a belt, a ring, something gold.”

Heidi then pressed the Golden Buzzer, because this week it was her turn to send an act straight to the final.

Dee Dee jumped for joy as the gold confetti fell around her. Heidi ran to the stage and hugged her.

“You’re going to the finals,” Terry said.