No, No, No! Gail filling in verses is NOT GOOD. She's got a lovely voice and I enjoy hearing it immesely on lead in Under Pressure and as back-up on other songs. But I HATE when Gail "fills in" for notes David feels less confident about hitting. At the 2000 BBC concert (I think, or was it the Bridge School Benefit, I forget), she sang part of the lead on Aladdin Sane and I HATED THAT!!! David sang the first verse (albeit at a lower key than the original song recorded in '73) and it sounded great, then Gail sang the second verse at a higher key (more akin to the original key). But since David's lower key first verse WORKED, I didn't like having him abdicate the second verse to Gail so she could sing it in a higher key. He should have done the whole song in the lower key, or, if he didn't like it that way, he shouldn't have done it at all.
I love Gail, but when I show up to see David live, I want to hear HIS voice on lead.