I think the three aspects of digital citizenship that stood out to me the most were:
Internet Safety - passwords and private information
All three of these concepts are important for children to understand as they navigate the web and technology.
I think that I would use the videos and activities from BrainPop to introduce each concept. There are also extra activities that can be printed out for follow-up on each subject. Students could use think-pair-share groups to discuss each topic and then share with the class any questions or comments they had on what they saw.
For music purposes, I would stress the importance of making sure they had permission to use music or music videos before they used them for a project.