Ps3 – Filter by game mode in SingStar

One difference between the two is that Singstar has a maximum score of 10000 for any one song, whereas the maximum varies hugely between songs on Lips.

This means that Singstar gives you some idea of what a "perfect" play is, but Lips does not.

Also, the waving around the microphone and clapping Lips is just...annoying.

In an article found here:

Rap sections use a combination of speech recognition and rhythm detection.

Essentially, not only do you have to get the timing right, but the words have to "sound" correct, too. Try enunciating your words as clearly as possible so that the audio recognition software can interpret you better.