Is there any truth in the rumour that Holly Valance was approached to take over as Buffy?

That is a complete falsehood! First of all, nobody could take over as Buffy. There could be a new slayer but there couldn't be a new Buffy.

There is only one Buffy. And second of all, I've never heard of Holly!

What's the weirdest rumour you heard about it?

You just gave it to me with that Holly story! That, and that I had directed Boy Meets World.