I am ignorant and need help

Ok so my big is getting married and our sorority is having a panties & pancakes party and let’s be real here... I’ve never been to this sorta wedding shower and idk what to buy her. Like bras and underwear (duh) but like I don’t know what style underwear should I get bc i know everyone likes something different and I don’t wanna ask bc I’m kinda embarrassed I don’t know what to get.