If you want Siri to answer your questions about the top songs on the charts, you'll need to sign up for Apple Music first. Users online, including Pandora co-creator and angel investor Tom Conrad, have noticed that searching for chart toppers in Siri is impossible, since that data is apparently locked into Apple's new music service:
The Verge's Ben Popper also found that searches for hit music of the past is also impossible.
It's worth noting that Siri being able to handle questions about the music charts has been linked to Apple Music since the service debuted last summer. However, that non-subscribers aren't bumped to a typical web search is surprising, and suggests Apple is pushing hard for users to pay after their three-month trials are up. We've reached out to Apple for comment.
Verge Video: Apple Music hands-on