The article in Spinner also listed 9 other other celebrities in music videos before they were famous, including Angelina Jolie in one for the Rolling Stones, Keaunu Reeves in one for Paula Abdul, and Johnny Depp in a Tom Petty one.
From the Upcoming ueue, submitted by KMOM14.
http://www.youtube.com/watch?v=P8Ab-1EWMKk