In this footage captured from a live webcast on the Thierry Mugler Facebook page earlier today, Lady Gaga made her catwalk debut at a Paris Fashion Week show featuring the work of Mugler designer and frequent Gaga collaborator Nicola Formichetti. Gaga did not sing, but the models walked to a megamix of new Gaga tunes including "Born This Way," "Scheiße" and the previously unheard "Government Hooker."