A pair of rather exceptional Idol Master MADs are presented here, one is just released, and the other one I hoarded for some time. Both are excellent.
Super Music Maker, with Haruka. Nico.
MadPV Sentaku Mix. Nico.
These are experimentally hosted locally (for when there’s a danger of Nico kowtowing to a studio, or of YouTube removing it over complaints of exposed ankles); please report any problems you might have. You may need to upgrade to the latest version of flash on account of the encoding.