Lyric discussion by italiancarne 

Cover art for Beautiful Song lyrics by Cansei de Ser Sexy

I agree, it does sound like it's about life on tour, it can also be about just living your life in general. Going out there and having fun, making mistakes, learning from them etc. The title of the song is well suited, it definately is a beautiful and nostalgic song. I also picked up on the sad vibe monstrrr, the song makes me feel the same way I do when I'm recalling a fun memory from the past but feeling sad about it at the same time because I can't relive it for some reason (person moved/passed away, place is no longer accessible to me etc.).