A list of most commented posts across all blogs. Is there a plug-in or code?

For example, if Blog A has a post with 25 comments, and Blog B has a post with 50 comments, I'd like the Blog B post to show up first on the list. Kind of the global recent post plugin-except it consistently shows the most commented posts in order.

I would like to put a widget or page on the front-page of the main blog.

Thanks :slight_smile: