Two more video clips posted by a gentleman on another forum.
The first clip shows Ma Chang practicing with her dad, a Chen Style Tai Chi Master (1:32).
Tribute to Sifu Ma Chang "Tai Chi Super Star"
http://www.youtube.com/watch?v=L0ypg3yuvQQ
She tried to popularize Tai Chi among the young people, using pop culture and entertainment formats they can relate to, to help them re-discover the ancient art.
http://www.youtube.com/watch?v=J4pKGID3sOI
I really want to cry after watching these...