Por que essas músicas são tão boas?

old but gold

https://www.youtube.com/watch?v=T3rXdeOvhNE&list=RDT3rXdeOvhNE&start_radio=1

https://www.youtube.com/watch?v=1GWQ-oDMG6g&list=RD1GWQ-oDMG6g&start_radio=1