Jessie J, Emeli Sande and Annie Lennox have also enjoyed sales boosts after last night's (August 12) show

Singer also hails Adele, Lady Gaga and Annie Lennox

Lennox says 'Talk That Talk' star could become 'tremendous spokesperson' for the issue

The March 9 show is part of the Women of the World festival in London

Last night, VH1 aired its VH1 Divas Celebrates Soul special, which featured a whole lot of wailing. And one of the wailers present was Florence Welch, who showed up to stunningly whoop her way through a pair of covers: Annie Lennox’s “Walking On Broken Glass” and a truncated version of Amy Winehouse’s &...