What actors and actresses appeared in The 100 Greatest Pop Videos - 2005?

You're likely thinking of the MTV's 100 Greatest Music Videos of All Time, which aired in 2005. This show, which was a countdown of the most iconic music videos, did not feature actors or actresses as part of its content. The show was simply a compilation of music videos from different artists.

It's possible you're thinking of a different show, or misremembering.

To be sure, you can search online for "MTV's 100 Greatest Music Videos of All Time" or check the MTV website's archives for that year to confirm the list of videos included.