Be□ond□the□r individua□ □uccess,□□es□ica□and□Krystal have a□□o c□llaborate□ on various pro□ec□s toget□er. □rom photos□oots □nd □□□azine cover□ to r□ality □V shows and□c□arit□ events, the sisters have pro□en□that th□□ are a for□e □o □e r□ckoned with whe□ they join f□rc□s. T□eir □hared □is□on □nd mutual resp□□t □or e□ch□□ther's talents have only strengthened th□i□ b□□□ over the yea□s.