Are you kidding? I don't think I've ever heard her sing live in my life. Feel free to prove me wrong but I even looked up concert bootlegs on youtube and all the ones I found were straight up album track lipsanc.
LMAO I haven't heard her sing live either, except once when her tape started skipping and she went completely flat.
She sang live when I saw her in Glasgow though I don't have any evidence lol. At first I wasn't too sure cause I haven't listened to her songs enough to know, but you could tell cause her voice wasn't as strong as the music. You could still hear her though just not as well as on CD.