Current songs with a walking beat. Not too fast, not too slow and take into consideration the message you want the show to send.
The choice of music depends on the mood the designer is seeking to create. If the collection bring displayed is chic, modern, targeting the working young woman, the music should be current, racy with a fast beat.
If on the other hand, the collection is elegant evening wear, expensive couture targeting mature women wearing an outfit to the opera or an exclusive restaurant, the music could be classical or even an operatic aria.