熊寶貝X魏如萱X陳建騏 – 螢火 ＠2012風和日麗連連看 (by aagoodday)
This clip was taken from July 2012 concert, put on by A Good Day Records.
If you listen closely / look carefully, you can notice the violin & accordion of NineteenTael Riecky & Achino.
But really, aside from hearing WaaWaa harmonize behind Cookie from Bearbabes, the cellist stood out, her playing was very prominent. The song builds to a powerful climax, really well done!
There are more songs from this concert, please follow the clip back to youtube.