you're not able to upload any songs of your choice on MySpace unfortunately
you only can do so if you're a solo/band artiste on MySpace .
I know that feeling because I want to put jpop songs that I adore on my a/c but there're no a/c sites on MySpace that does that
so in the end I only can add in Utada's songs on my playlist that I can find them from her official MySpace site & that goes for OLIVIA too