I was listening to the song Secret by Louane and I keep getting hung up on how she pronounces one word in the chorus. You can hear it here at 1:09, when she sings "J'ai toujours eu un peu de mal à m'aimer" but she pronounces the eu as ai, almost as though she were saying J'ai toujours ai. She does it again in every chorus of the song. You can hear it mostly clearly in the song's final line, at 3:00, when she says it a bit more slowly, but again pronounces it the same way.
Why is that? I haven't heard it pronounced that way before. Does this somehow sound normal to a native speaker's ears anyway?