Her Grammy's performance with Jay-Z was prerecorded for sure. I wish Britney would pre-record her stuff too instead of lip-synching to 15 yr old vocals. And we all know about Beyonce's lip-sync controversy for the Presidential Inauguration.
To make it easier to read I made the mostly lipped performances red.
Formation:
Live: First Verse, Last Chorus and Outro.
Pre-recorded: Rest of the song. Sorry
Live: First few lines (+2nd chorus when she doesn't skip straight to the bridge)
Lipped: Rest of the song Irreplaceable/Kitty Kat accapella:
Live: 100% Bow Down
Lipped: 100% bar ad-lips and and Tom Ford outro Run the World
Lipped: 100% bar outro Mine
Lipped: 100% Baby Boy
Lipped: 100% bar ad-libs. Hold Up
Live: 1st verse
Lipped: Everything else Countdown
Lipped: 100% Me Myself and I:
Live 100% Running:
Live 100% All Night
Live 100% Don't Hurt Yourself:
Live 100% Ring the Alarm:
Live 100% Diva:
Live 100% Flawless/Feeling Myself:
Live 100% Yonce:
Live: 50% The first half (almost accapella)
Lipped: The second half. Drunk in Love:
Live 100% Rocket:
Live 100% Partition
??? I really can't tell on this tour but its normally lipped. Daddy Lessons
Live:100% Love on Top:
Live 100% 1+1
Live 100% The beautiful ones:
Live 100% Crazy in Love Remix/Original:
Live 100% Naughty Girl
Live: The ad-libs
Lipped:Most of it Party
Live 100% Freedom:
Live 100% Survivor:
live 100% End of Time/Grown Woman
Live: Maybe the first line
Lipped: 80-100% Halo:
Live 100%