I know that the sudden change in the line-up (personnel) in "Brasil '66" that took place in early 1968 has been discussed on this forum before -- but those threads are probably locked by now, I think. Anyway ... He is a new angle and possible way of thinking about this topic -- Someone suggested that Lani was actually part of the purge -- not just Janis Hansen, and the other musicians in the first line-up of B'66. (And someone posited/mused that he couldn't imagine Lani complaining (like the others were), and I agree.) Maybe, just maybe -- Sergio had taken a liking to Gracinha Leporace by early 1968 -- and had her in mind as his preferred lead vocalist. For one thing (This is a minor (possible) factor), both Lani and the Brasilian Gracinha had dark hair, so maybe some of the audience might not notice the difference in lead singer. (In fact, it's possible that some B'66 fans might have not known better than to assume, or be under the impression that Lani was, in fact, Brasilian, herself. She seemed (at least to non-Brasilians) to sing the Portuguese lyrics, convincingly.) (Obviously, Sergio liked Gracinha Leporace -- because he's been married to her, to this day.) Maybe, another line of thinking is that -- by 1968, Sergio felt that he had achieved enough success, fame, momentum, clout -- that he could go back to having an all-Brasilian cast (line-up of band members) and not need an American lead vocalist. But, the firing of Brasil '66's first line-up took place right before "Look of Love" became Sergio's 2nd big big hit single, right? (So, it's not like Janis could have had any clout with having sung the lead (verses) on the latest big big hit single. Sergio didn't seem to have trouble replacing her with Karen Phillip, anyway.) I dunno -- I'm just a fan who is guessing. I don't have any sources, than my own rational thought processes and whatever body of factual knowledge I have access to.