OK sorry, I didn't realize that. I went and looked this up on allmusic.com because I don't want to get anything wrong. I found out that Glenn hasn't been on any of Newman's albums since the seventies and Don also appeared on the albums Glenn was on. Meanwhile Don appeared on a Newman album in the eighties without Glenn, and Newman asked Don to be the star of his Faust soundtrack in the nineties. Glenn may have done a Newman song but people cover Newman songs all the time. I'm not trying to diss Glenn but it seems pretty clear why Don is doing this and not Glenn and I don't think it's because Glenn 'does not do these events.'
Anyway complaining about Glenn not doing it in Don's forum seems out of place. JMHO.
For those who looked up the information on the Rush and Heart things, thanks. I can see why Rush fans would be pissed off that he said their group was 'yuck' but he was just being honest. As for the Wilson sisters saying no to Don when he was looking so fine ~ wow, something things I'll never understand.