So she ran around in her bra and panties out of nowhere 
it was intended as a spoof, making fun of recent events where activists hijacked televsion shows and demanded attention
so it was a setup, however they did not anticipate the getbigger sitting at the bar
at the end of her first appearance, just before she went backstage she slapped her own ass, the getbigger thought that was a great idea and decided to slap hers too
the guy was removed from the show