The rapper, decked out in grey hoodie and sweat pants designed by the 36-year old Plein, performed inside a mock boxing ring where two fighters, the so-called "Demolition man" and his adversary, were enthusiastically sparring.
Paris Hilton, eye-catching in plunging neckline and crystal-studded jacket, was among the celebrities looking on from the front row as models decked out in the Fall-Winter 2015 collection of warrior-inspired street wear paraded around the outside of the ring to the beat of tribal drums.
It's not the first time Plein - whose show wound up Saturday's line-up after Versace - has overshadowed his more prestigious colleagues in the fashion world.
The catwalk for his men's Fall-Winter collection last year went Western, with a show including live horses and a shootout amongst cowboys, while the men's Spring-Summer 2015 show took pace in an abandoned public swimming pool with a performance by a group of synchronized swimmers.
Men's Fashion Week runs until Tuesday, with Prada, Gucci and Fendi still to come.
Watch a video of the Plein show: