謎が解明されました(><)
この「Bohemian Rhapsody」はThe University of Californiaの学生アカペラグループ「UC Men's Octet」の80年代からの持ち歌のようです。そのグループが90年代に誤ってこれを「Rockapella」の曲だと表記してネット上にあげてしまったようです。それ以来多くの場所でRockapellaのアレンジだという誤認をされてしまっているみたいです。
詳細はYouTubeのライブ映像に注意書きとして書かれていました。
http://www.youtube.com/watch?v=UyqpjkCwEI4
Note: To alleviate any confusion, Rockapella never did this arrangement. Some time in the late 90's, the Octet's recording of this song was mislabeled online as a Rockapella song. This acapella arrangement is a Men's Octet original and has been passed along within the group from year to year since the 80's.
【参考】
UC Men's Octet公式サイト
http://ucchoral.berkeley.edu/ucchoral/octet/pages/home.htm
アルバム「Eight Is Enough」について
http://en.wikipedia.org/wiki/UC_Men's_Octet#Eight_Is_Enough
"Satellite", "Stay", "Crash Into Me", and "Ants Marching."
The Coca Cola and Gummi Bears commercials.
"Amazing Grace."
"Breakfast at Tiffanys"
"Save Tonight"
"In the Still of the Night"
"Chain Gang"
"Brown Eyed Girl"
"Every Breath You Take"
"Say Goodbye"
"Semi-Charmed Kind Of Life"
"Leaving On A Jet Plane"
"I Can See Clearly"
"Wonderful Tonight"
"Lean On Me"
"Smooth Criminal"
"Carol Of The Bells"
"Shoop Shoop Song"
"The Pink Panther Song"
"Eye Of The Tiger"
"Hard To Say I'm Sorry"
"California Dreamin'"
"What I Got"
"Walking In Memphis"
"Pachelbel Canon"
"Friends Theme (I'll Be There For You)"
"Time After Time"
"Tears In Heaven"
"500 Miles"
"Swing Low Sweet Chariot"
"More Than Words"
"Man In The Mirror"
"Gangsta's Paradise"
"Semi-Charmed Kind of Life"
"Basket Case"
"For the Longest Time"
"Summer of '69"
"Swing Low Sweet Chariot"
"Sexual Healing"
Any song from the Nylons album entitled "Rockapella."