Gibs -- the backing vocals, drums (but *not* tamborine), high attack rhythm guitar (mm-gah, mm-gah), and lead were me. The lead vocal, bass, tamborine, and strummed rhythm guitar were from the original. How can you call yourself a Beatles fan and not have the Anthologies? At least get A2!!! ;^{)
drstawl -- There's no cello on this. Maybe you're mistaking the backing "ooohs" in the middle for a cello?
MikeDog