There were many good music albums that were released in 2000. Here is just a trailer on this, watch/listen full version for more.
2000 was remembered mostly for Mohabbatein and Dhadkan composed by musical duos Jatin-Lalit and Nadeem-Shravan respectively. These were also the most sold music albums that year.
Besides these there were many others like Refugee, Kaho Naa Pyaar Hai, Mission Kashmir, Har Dil Jo Pyar Karega, Kahin Pyaar Na Ho Jaaye and so on.
Links for full version