Who Are You (song) "Who Are You" was released as a double-A side with the John Entwistle song, "Had Enough", but "Who Are You" was the more popular song, reaching the Top 20 in both the US and UK. The song has since been featured on multiple compilation albums. The single mix contains an alternate acoustic guitar solo to the album mix. The bright rock beat song is written in the key of E major. The album version includes a third verse compared to the much shorter single. Additionally, a "lost verse" mix of the song was released on the 1996 reissue of "Who
Know Who You Are on the lyrics. Stark simplicity behind. The effect is very good indeed. Darned near slayed me." In a review of "Play It Loud", "New Musical Express" noted: "Aggressive - that's what the music and vocalising of Slade seems to be, though they vary the volume with great skill, at times quiet, then turning it up and shouting at the listener as in "Know Who You Are"." Joe Viglione of AllMusic retrospectively said: ""Know Who You Are" is a wonderful study here; the band is more proper dipping into that Yardbirds bag again on this original. By the time it was