Can Taylor harmonize live?

I saw someone suggest Taylor should duet with Bruno Mars and after I LOL’d thinking about how he just shits all over her musically, can she harmonize live? For example how Gaga and Bruno harmonize in Die With A Smile? The only harmony I have ever seen from her was the atrocious Stevie Nicks duet. I’m not talking about backing vocals etc…I mean clear cut harmony during live vocals. Anyone know?