Biebs made a surprise appearance at the Laugh Factory on Friday -- during comedian Chris D'Elia's set -- and the ex-"Whitney" star ROASTED Justin for his ridiculous fashion choices. Douchey genie pants and leather tank top, por exemplo.
Justin sat quietly through the ribbing until D'Elia made a joke about Justin only "f***ing" himself -- that's when JB just had to respond with a quip that was disgustingly misogynistic ... or totally female-friendly.
Depends if you're a Belieber or Gloria Steinem (Google her).
