"Sorry, I'm going to take your spot!" Roberts joked.
But before she could fully act the part, Roberts needed to look the part. She was presented with the trademark uniform -- a blue blouse, a white vest and white shorts adorned with glittery blue stars. She also got to wear a pair of the team's classic white cowboy boots.
After hair, makeup and wardrobe, Roberts' transformation to a Dallas Cowboys Cheerleader was almost complete. Still, Finglass wasn't quite convinced.
"I think there's something missing in your motivation. You've never performed in front of fans, right?" Finglass asked.
A surprise visit from Roberts' husband, Kevin, was just the audience she needed.
"My husband came in and it actually gave me more adrenaline and I thought, I can do this, I can do this," she said.
With her special guest there, Roberts was finally ready to show off what she'd learned. She performed the routine for her husband, the squad and the directors.
Roberts nailed the performance of a lifetime, and even brought tears to her husband's eyes.
"I am very proud of my wife. Today she's making memories that are going to last for a lifetime," Kevin Roberts said.
And for her, it was a lifelong dream finally fulfilled.
"Today was more than I could have imagined. They made it fun so I am so thrilled," Roberts said.