▁ 6 : 3 5 ▁A 2 ▁" What ▁You ▁Don ' t ▁Know ▁( M ight ▁H urt ▁You ▁Be ats )" ▁– ▁ 2 : 3 6 ▁A 3 ▁" What ▁You ▁Don ' t ▁Know ▁( Radio ▁Mix )" ▁– ▁ 4 : 1 0 ▁B 1 ▁" What ▁You ▁Don ' t ▁Know ▁( B ass ▁Mix )" ▁– ▁ 7 : 0 9 ▁B 2 ▁" What ▁You ▁Don ' t ▁Know ▁( C ros so ver ▁Mix )" ▁– ▁ 6 : 3 6 ▁ ▁Cred its ▁and ▁personnel ▁G io ia ▁Bruno ▁– ▁lead ▁vocals ▁Ann ▁Cur less ▁– ▁backing ▁vocals ▁Jean ette ▁Jur ado ▁– ▁backing ▁vocals ▁Lewis ▁A . ▁Mart ine é ▁– ▁writing , ▁producer , ▁engineer , ▁mixing ▁" L ittle " ▁Ces ar ▁S og be ▁– ▁engineer ▁( ass istant ▁engineer ) ▁Mike ▁Cou z zi ▁– ▁engineer ▁( br ass ▁recording ▁engineer ) ▁Is ma el ▁Gar cia ▁– ▁executive ▁producer ▁Francisco ▁J . ▁Dia z ▁– ▁executive ▁producer ▁Mike ▁Full er ▁– ▁master ing ▁R ique ▁" B illy ▁Bob " ▁Al onso ▁– ▁mixing ▁ ▁Ch arts ▁ ▁Week ly ▁charts ▁ ▁Year - end ▁charts ▁ ▁References ▁ ▁External ▁links ▁U . S . ▁ 1 2 " ▁single ▁info ▁from ▁disc ogs . com ▁ ▁Category : 1 9 8 9 ▁singles ▁Category : Ex pos é ▁( group ) ▁songs ▁Category : S ongs ▁written ▁by ▁Lewis ▁Mart ine é ▁Category : Ar ista