What are /r/La_La_Land's favorite Products & Services?

From 3.5 billion Reddit comments

For piano sheets, I go to musicnotes.com, they're usually about $5-6 per song. La La Land is dominating their top download chart right now:

http://www.musicnotes.com/topdownloads/

Or if you want to wait for the whole book, it appears to be available for pre-order on Amazon (will be released Jan. 26th)

https://www.amazon.com/Land-Music-Motion-Picture-Soundtrack/dp/1495088243/