"Thank You" by Dido completes the final three HMX DLC for the Rock Band franchise. safe to say, the song's sentiment is shared by the entire RB community. 
Personally, my three children grew up playing RB and GH, and literally dragged me into the game because they needed a singer. They have all moved away, but my love for the game remains, and it brings me joy that every time they visit, we still fire up the game and play.
Past, present, and future THANK YOU Harmonix for giving us this franchise where we experienced some of the best moments of our lives. The friends we have made, the fun and laughter we have shared, and the bonds we have created won't end even if the game does. -Kelly

Guitar - Alex
Drums - Chris
Vox - Venny G
Bass - Daisy