I tried to translate the Go My Way sheet yesterday, but the note where the right two holes are covered isn't listed in any 4 hole ocarina chart i found. Trying around didn't give anything that sounded right either (not just the note, but the whole melody).
I ended up searching for idolm@ster midis, because i have a midi editor that shows a midi in a musical notation (i learned a bunch of non-imas-songs like this), but unfortunately i couldn't find any at all.
So i started searching for sheet music. And with this i found the "Idolm@ster Master Book", which apparentely also contains the sheet music for 16 songs (as it's from 2008 READY will be missing unfortunately)

I orderd it from CD Japan now, i guess i'll get it in 2 to 3 weeks. As the singing is prominent in imas i'm sure they'll contain the notes for the vocal voice (which is sometimes not the case in midis, you have to extract the melody there) which is perfect for the ocarina. It has a similar range than the human voice and both can't do chords
