When I found this out I picked up a bunch of PS2 singstar collections off ebay for pennies instead of having to shell out 1.5 per song.
PS3 SINGSTAR SONGS TO PS4 PS4
i ended up buying a ps4 actually, and keeping the ps3 for my family to enjoy, and for some of the good old games that i dont have for ps4 like Skate 3. As the official team removed the old PS3 port in favor of the Open Source psl1ght SDK. I guess it'll never fully replace the PS3 for us then. For sometime there has been an unofficial port of RetroArch PS4 by developer OsirisX, who (unrelated to ps4) also shared recently his progress on the psl1ght port for the PS3 here forums, to help bring the PS3 back into the mainline RetroArch repo. Voilà, ça fait pas mal de temps que je parcours les sites web à la recherche de la liste des chansons des SingStar sortis sur PlayStation 2. The PS3 version of this game was awesome though, it also had a little known feature where you could even load your ps2 singstar discs to play all of those songs (even on the slims and super slims). Sad the latest system can't play the bulk of our sing star tracks.