And she was joined by royalty!
Michael Forever on Facebook
Next weekend's Michael Jackson tribute concert in Cardiff is going to be live on Facebook.
Organisers say it'll be the first ever global pay-per-view entertainment event.
It'll cost about £3
Beyonce, the Black Eyed Peas, Christina Aguilera and JLS are among those on the bill at the Millennium Stadium.
She took the mirror selfie before the reverse camera was even a thing! Say what?!
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