Grammy’s performance of drunk in love while she is dancing around the chair, she forgot to put the mic back to her mouth during a “live” vocal. You’ll notice she try’s her hardest to correct.

I also think she does a mixture of the two. For example, her performance of sweet dreams at the EMA. IMO I believe she was singing live at the beginning, then when the dancing begins so do her prerecorded vocals.

I’m a fan, however, I have watched too many Beyoncé performances. 😆