Madonna is featured twice in the countdown: Madonna: Ray of Light (1998) and Madonna: Frozen (1998).
Céline Dion is featured twice in the countdown: Céline Dion: My Heart Will Go On (1997) and Céline Dion Feat. The Bee Gees: Immortality (1998).
Despite to be a Top set in 1993 and 1998, it features some songs from 1992 and 1997: Charles & Eddie: Would I Lie to You? (1992), Dance 2 Trance: Power of American Natives (1992), Captain Hollywood Project: More and More (1992), Spin Doctors: Two Princes (1992), Whitney Houston: I Will Always Love You (1992). All Saints: Never Ever (1997), Aqua: Doctor Jones (1997), Céline Dion: My Heart Will Go On (1997), Janet Jackson: Together Again (1997), Natalie Imbruglia: Torn (1997) and Savage Garden: Truly Madly Deeply (1997). This is not a mistake: they were included despite to be released in that years because they reached the top chart in 1992 and 1997 as well as 1993 and 1998, or they don't reached the top chart in 1992 and 1997 but in 1993 and 1998.
Whitney Houston is featured twice in the countdown: Whitney Houston: I Will Always Love You (1992) and Whitney Houston: I'm Every Woman (1993).
Janet Jackson is featured twice in the countdown: Janet Jackson: That's the Way Love Goes (1993) and Janet Jackson: Together Again (1997).