Assuming it's a real song, the next step is to consider legal platforms. The user might want to know where to find it on services like Spotify, Apple Music, Amazon Music, which are legitimate. Also, YouTube might have official links, but downloading directly from YouTube can be illegal unless they use YouTube Premium's offline feature.
Alright, putting it all together. Start with confirming the song's existence, proceed to legal download options, discuss risks of illegal methods, alternatives if song isn't found, and summarize the importance of legality.
Wait, the user asked for a detailed review, so maybe include pros and cons of each method, user ratings for platforms, maybe how to identify a trustworthy site. But don't recommend any particular sites, just guide.