There was no universal track listing or cover art for the "Greatest Hits" album, and each territory's tracks were dependent on what singles were released there and what tracks charted. In some cases, despite the band's popularity, not enough songs were issued as singles to fill a compilation album, and a few album tracks were used as filler. Some examples of these were "Sweet Lady" and "Love of My Life", neither of which was released as a single in any country, but appear on some regions' "1981 Hits" release. In the UK, the album was limited to the Queen singles that had reached the top 20 in the UK singles chart up to that point, plus "We Will Rock You", which had been the B-side of "We Are the Champions".