Plasmo - I think the jeans you are talking about are Seven. They seem to look good on any shape and size.

I actually had a great experience in Levis recently - went into the one in Bluewater, and said, "as you can see, I am short, with big bum, and pair shaped - what have you got" - she gave me a pair to try on and I loved them, thankfully they were from the 40 quid range rather than the 80 quid range!

In this day and age where shop assistants have zero product knowledge I was well impressed