Thanks to a post on efairy.net by choongkop, I found this 15 second ad of Crystal Liu Yifei advertising Garnier's Aqua Defense Eye Roll-On product!
It's off the main Garnier website: http://www.garnierchina.com/_zh/_cn/minisite/eye_roll-on/how2apply.aspx
Thanks also to choongkop for providing this sendspace link to her WMV version of the ad:
As well as the screencaps here (Please click to enlarge!)
Also, I found this candid photo of Crystal Liu Yi Fei at the Harper Bazaar's Charity Night from August last year: