This was mentioned some time ago (in the old forum?) but you can hear a bit of "Pink Lady's" UFO in Jazz A Go Go (in the part where she scats).
Wouldn't have noticed it if not for the Jihen Ondo Video someone posted on youtube some time ago. I'm still hoping to see it again though.
For those people interested there was a post in pariscombo (or was it Op2?) 's blog about the entire breakdown of Ringo Catalogue.
http://www.thetokyoincidents.com/arc...catalog_b.html
Ah, also there was the unresolved issue of the backmasked vocals in shiroi kobato.