So ****in excited to hear the new Nicole track, the new version of Reach For The Stars, the finished Mona Lisa Smile, everything !!!!!!!!!!!!!!!!!!!!!!
He's executive producing her album. That usually means he's produced more than 5 tracks on the album too. Hoola Hoop can be one of them, even if it's just a bonus track.
I think Hoola Hoop was never meant for wide release, the song was leaked on purpose, like the Bieber track, maybe he like dthe tracks, but didn't see them as good album tracks and used them for promotional usage.
Smile Mona Lisa probably has Nicole not credited, because she is probably only featured with those classical vocals, nothing more.