As an Air Supply fan from the beginning, I have been looking for years for a "definitive" hits collection that includes every song of there's to crack the Billboard Hot 100. I used to own their "Greatest Hits" which was issued in 1988, but it left off key tracks including: "Young Love", "Two Less Lonely People in the World", "Just as I Am", "The Power of Love (You are my Lady)", and "Lonely is the Night". Then this collection came along which did include "Young Love", "Two Less...", and "Just as I Am". In a sense I guess it is definitive in that it includes all of the songs to make the Top 40. However, it leaves off the singles that did not make the Top 40: "The Power of Love" which peaked at #68 and "Lonely is the Night" which peaked at #76. Since this release, they have put out another hits compilation called "Ultimate Air Supply" which is still not a complete collection because it still leaves off "Lonely is the Night". If you are looking for a true, definitive collection, the only on Amazon is an import that sells for $24.49, which seems a bit steep. I am gonna stick with this one that has all of the Top 40 hits, and try to download those other 2 songs. If you are looking for just the Top 40 hits, this collection will suffice.