▁asked ▁to ▁ch ore ograph ▁themselves , ▁aside ▁from ▁sol os . ▁ ▁The ▁callback s ▁are ▁often ▁collect ively ▁port rayed ▁as ▁one ▁of ▁the ▁most ▁exhaust ing ▁and ▁stress ful ▁stages ▁of ▁the ▁competition ; ▁each ▁success ive ▁round ▁sees ▁cut s ▁in ▁which ▁a ▁significant ▁portion ▁of ▁the ▁remaining ▁d anc ers ▁are ▁elimin ated ▁from ▁competition ▁and ▁d anc ers ▁are ▁given ▁a ▁limited ▁amount ▁of ▁time ▁to ▁adapt ▁to ▁styles ▁they ▁are ▁sometimes ▁wh olly ▁un famil iar ▁with ▁while ▁being ▁phys ically ▁tax ed ▁by ▁the ▁rapid ▁pro gression ▁of ▁r ounds ▁and ▁a ▁limited ▁amount ▁of ▁rest . ▁ ▁At ▁the ▁end ▁of ▁this ▁process , ▁usually ▁less ▁than ▁ 4 0 ▁compet itors ▁remain ▁in ▁a ▁pool ▁that ▁final ▁contest ants ▁are ▁chosen ▁from . ▁ ▁Most ▁seasons ▁have ▁featured ▁ 2 0 ▁" top " ▁final ists ▁for ▁the ▁competition ▁portion ▁of ▁the ▁show , ▁but ▁season ▁ 1 ▁was ▁represented ▁by ▁a ▁Top ▁ 1 6 , ▁season ▁ 7 ▁saw ▁a ▁Top ▁ 1 1 , ▁and ▁seasons ▁ 1 3 ▁through ▁ 1 5 ▁have ▁featured ▁a ▁Top ▁ 1 0 . ▁ ▁Final ist ▁Stage ▁Following ▁the ▁final ist ▁selection ▁process , ▁the ▁show ▁trans itions ▁into ▁its ▁regular ▁competition ▁phase , ▁which ▁last s ▁the ▁rest ▁of ▁the ▁season . ▁ ▁The ▁competition ▁stage ▁is ▁typically ▁divided ▁into ▁eight ▁weeks , ▁ ▁generally ▁with ▁two ▁contest ants ▁elimin ated ▁per ▁week . ▁Dan cers ▁are ▁pa ired - up