At an after-party for the Met Costume Institute gala at Submercer on Monday, the invulnerable star of "24" got into an argument with fashion label Proenza Schouler co-founder Jack McCollough which ended with the macho actor head-butting the flamboyant designer and breaking his nose. The night-life blog Guest of a Guest reported the argument stemmed from a conversation Sutherland was having with actress Brooke Shields, though no further details were provided. (All three were at the gala earlier in the evening.) McCollough reportedly spent the night in the hospital. Sources told The Post McCollough filed a complaint with cops last night. - PAGE SIX, NY Post