Do you know anything about the designer Donna Karen?
Yes, I do.  She is an american fasion designer and creator the DKNY clothing labels.  She's quite famous.
Where do they sell her clothing items - in malls or more upscale places?
She sold the company in 2001 to Louis Vuitton Moet Hennessy.  Her clothing was typically found in malls
So does she still design or is she out of the business?
LVMH has 60 subsidiaries.  DKNY is one of them but, Donna Karan is not designing for them anymore
Does she do dresses for the stars, like on the runway for events like the Grammy's?
Not so much anymore.  Since 2015 she's really been focused on her Urban Zen brand and foundation.
I've never heard of that brand - is it more casual?
Yes, it's much more casual than the fashion goods for men and women that DKNY produce.