Chan Marshall sings a Cat Stevens cover 'How Can I Tell You' in the
A Diamond is Forever 2006 De Beers TV commercial "Xmas Morning"
http://www.youtube.com/watch?v=gPODOUc8TRI
she's up & gone off the deep end for real...
De Beer's soiled name is nowhere to be found in the ad, by the way, but it is their commerical.