The last band in our theme this week of "Alan Parsons Six Degrees of Separation" is Ambrosia. While none of the original Ambrosia band members have ever been part of The Alan Parsons Project, the four original musicians (David Pack, Joe Puerta, Christopher North, and Burleigh Drummond) all appeared on the first APP album, Tales of Mystery and Imagination. Later, David Pack would appear on the first of the "solo" Alan Parsons albums, Try Anything Once. Likewise, Parsons was engineer for Ambrosia's self-titled first album, and producer for their second album, Somewhere I've Never Traveled.
This particular song, Biggest Part of Me, appears on Ambrosia's fourth album, One Eighty (so named because it was recorded in January 1980). The song reached #3 on the US charts, and the album generated three Grammy nominations, including Best Pop Vocal Group. This particular video I believe comes from The Mike Douglas Show.