Hansen's

A company response posted on Delphi - Avoiding Corn confirms that the ascorbic acid and citric acids used in Hansen's products are derived from corn.

While juice was the initial inquiry in this instance, any Hansen's products with these ingredients should be considered unsafe. (which I think is all Hansen products)

According to Hansen's website, their products include:
Hansen's (several products which clearly state Hansen's on the label)
Blue Sky Sodas
Fizzit (vitamin & mineral drink)
Juice Slam boxes
Rumba