LOVELAND, Colo. -- Ariana Evans, 4, is being hailed as a hero after making a critical call for help. The girl's mother had passed out behind the steering wheel with Ariana and 2-year-old brother Alex in the car.

"I wasn't crying or upset," Evans told Denver television station KMGH when recalling the incident.

Evans was able to slip out of her car seat and press the OnStar button in the car after her mother blacked out. Emergency crews were immediately dispatched to the vehicle, which was in a parking lot at Bittersweet Park in Greeley. 

Amanda Watkins, 25, said she can't remember pulling over.

"The last thing I remember was I was going to hit a pole, then everything went black," Watkins said.

Watkins said her medical problem has been diagnosed as a viral infection that can include bouts of dizziness or loss of equilibrium. Watkins said the infection combined with a medication she was taking for migraine headaches caused her to lose consciousness.

After calling OnStar, Ariana said she stayed by her mom and rubbed her hand until help arrived.

She remembered the voice that initially answered.

"It said, 'Hello, what is wrong?'"

The 4-year-old responded that her mom was sick and not waking up.

For her efforts in February, the Greeley Police Department just honored Ariana with a Citizens Certificate of Merit, plus a teddy bear and gift certificate to Chuck E. Cheese restaurant.

"I never knew angels came in the form of children, but that's how I feel about Ariana," Watkins said. "She was an angel that day."

Watkins said she never talked with her daughter about the OnStar feature. Ariana said she learned about it after hearing the sales person talk about it when they purchased the car two days earlier.