Sweet Sounds

Piano Guys
https://www.youtube.com/channel/UCyFFKWBM64oxNtxnWPQJ0AQ

Pentatonix
https://www.youtube.com/channel/UC9ouIc5bVUPVzZ0X_JETPEA

Lindsay Stirling
https://www.youtube.com/channel/UCzwzVFgZa3AS9IPLPfJjf1w

General Music Links 

Music Expresss Magazine
https://www.youtube.com/user/musicexpressmag