Variations on A Cappella Theme

I was searching for a cappella songs, and ran across this one.  I hadn't heard of Kara Della Valle and Grace Doty, but I do know the original `Cups (When I'm Gone), sung and performed by the pretty Anna Kendrick.  Kara and Grace, along with Otto Tunes, do a truly fine cover.

These guys from University of California do an awesome `Bohemian Rhapsody in a cappella!

Perpetuum Jazzile does a totally a cappella rendition of Toto's "Africa," rain and all!