I should probably make a song-by-song impressions post about Light Years and Fever (close to perfect pop), but I have to mention Come Into My World first. There's something so awesome about that song. Cool music video, but it's the simple and fun lyrics and Kylie's voice that make it special for me. She's no vocalist on the Mariah/Christina level but still just right for some songs. I like the playfulness of CIMW, but Confide In Me has wonderfully clear vocals.
Edit: well, I used an abbreviation and managed to get it wrong! The Ayu news today have hurt my ability to post coherently.