The pants aren't that tight, and they are kind of dressy cause they are white. They dress would not be very dressy, and definitely no longer than the knee. BOTH with heels.
Most Helpful Guy
Well, one of the best aspects of heels are that they make a girl's ass look really good, so I would suggest that wearing the pants might make the best use of that benefit.
That being said, a nice dress at or just a bit above the knee, if definitely really hot. Sounds like either would be a great option.1