<□□□ey□n□ the□□ indi□idual success, □essi□a and □r□stal h□ve also colla□orated on□va□ious pr□jects togethe□. Fro□ p□□tosh□o□□ and mag□zine□cover□ to □eality TV □ho□s and char□ty events□ the sisters have pro□en □hat they □r□ a f□rce to □e reckoned □ith when they□□o□n forces□ Their shared v□□□o□ and□mutu□l re□pec□□for □ac□ other's talents h□ve o□l□ strengt□ene□ th□ir bond o□□r □h□ years.