List of Michael's performances (lip synch info):
J5 / Jackson's era: tours and full concerts, and one-offs were usually live, meanwhile television appearances and award show performances were more often than not, lip synched.
Award Shows: Usually lip synched all the way through, Motown 25 Jackson 5 medley was live, Billie Jean was literally the album track sped up a little. Grammys 1988 was lip synched, the last half of Man In The Mirror was live. MTV 1991, all lip synched except for the end of Will You Be There. Dangerous at the AMA's was lip synched. Remember the time at the Soul Train awards was lip synched. at MTV 95 ', lat bit of YANA was live (same as on Soul Train 95'). Wetten Das 95 'was entirely lip synched. WMA 96 'was lip synched until MJ's ad libs at the end of Earth Song. Brit Awards 96 'was lip synched as well. Elizabeth I love you was live at the beginning but the rest wasn't. WMA 2006 was live (the bit he was on stage during WATW)
Victory Tour: 100% Live
BAD Tour: The 1987 leg was all live. The first USA leg in 1988 was mostly live and I'm pretty sure the first few concerts of that leg were entirely live (except the first half of MITM) I'm not sure when I've started the lip sync more on that tour but I imagine it was more towards the end of that leg and then started turning his microphone volume down for the first half of Smooth Criminal, Bad, TWYMMF, and MITM, but always finished the song live.
Dangerous Tour: Jam was lip synched and occasionally he did ad lips to start the song and on a few occasions his mic was on over the playback at the end of the song. Smooth Criminal was lip synched and there were a few times where the playback came in late (fun fact the first few lines in Bucharest and Munich 1992, were live) Thriller , IDk why this was but probably to make the transition into the disappearing act smoother . WYBT , Idk why that was lip synched either, end was live though. HTW , was prolly cuz it sounded better (IDK either), Bad , and TWYMMF were usually lip synched until the end of the song (until they were dropped from the set), andMITM was lip synched the first half, the live.
Brunei 1996: Same songs were lip synched and live as for on Dangerous Tour, end of YANA was live. I believe that at various times during Earth Song he sang over the playback, the ending ad-libs were live.
HWT: Only WBSS , J5 Medley , the speaking parts of in the closet , the end of Smooth Criminal , the ad-libs on Beat It , the ad-libs on Billie Jean , end of Heal The World , and end of History were live . There were some concerts where he sang parts of dangerous live, and he sang the first verse of Scream live in Brunei. In one of the Amsterdam shows he sang the end of TWYMMF live. I think the first Blood On The Dancefloor performance had live vocals on it. There were a few other instances like in Budapest where he sang over playback ( TDCAU ). But that was rare.
MJ and Friends: Intro was lip synched I believe, the ad-libs during Slash's guitar solo were live, the end of Billie Jean was live, the end of YANA was live.
30th anniversary: all Jackson 5 / Jackson's stuff was live, he sang TWYMMF with Britney no playback, and I think the other night was a mix on that song too. Billie Jean he sang over playback at times and did the ad-lips, Beat It was half live, Black or White was live for the end, and Y ou Rock my World was live except for the bridge.
United We Stand: Man In the Mirror was performed like at Royal Brunei, What More Can I Give Was live, but dubbed with studio vocals in the official release of the show.
Apollo 2002: Dangerous was lip synched, Black or White was lip synched, Heal The World was live at the end.
This Is It: WBSS would have been live, Jam would have been playback with ending ad-libs live, Stranger in Moscow was rehearsed live (but he also rehearsed it live for HWT and lip synched it on the tour sooo who knows). They Don't Care About Us was lip synched and ending ad-libs live. Human Nature was live. Smooth Criminal was a mix, it was rehearsed live but the editors of the film edited in so the first verse through the second verse were lip synched, but based on its mixing I'd say he rehearsed live but the vocals weren't salvageable for the film. TWYMMFwas live at the slow, verses and chorus' lip synched, and end ad libs live (there is audio of him rehearsing entirely live so IDK). J5 Medley was live. IJCSLY was live. No info on Dangerous . Dirty Diana was prolly live. Beat it was live. Thriller was lip synched but not much is known about this song either as there is no about the song (no full amateur recordings). Earth Song I believe was live then the end was lip synched or a mix, the 24th rehearsal was live (but the film edited it) because the microphone was off and playback came on I believe somewhere right before the "what about us" part. Billie jeanprobably was playback until after moonwalk but it could have been live. Man In The Mirror , I have no idea about, the film has it entirely playback with a few lines live at the end, but also not much is known here either. You are not alone I don't know about, But if he did it like on HWT then it was lip synched until the ending breakdown. Will You Be There , there isn't much on either, but based on an amateur recording, it was live . and The OTW medley , I literally know nothing about, and Heal The World doesn't have much info out there either. I know Michael wanted to sing as much as possible on this tour, combined with the fact that we haven't seen that much info on every song, we can only inference, but I'd say it was going to be mostly live!