Yes, they are.

i love that i can enjoy these right form plurk

from

isn't amazing how all the music is their voices?

this is soooooo cute. Even my husband was laughing. The dancing bananas were on the side dancing along too!

Wow! Those boys gotz movez!

I can vouch for how much work and practice goes into this! My daughter is in an acapella chorus at Va.Tech, and works her patooty off.