3 Using your library’s online databases, search through secondary data sources to gather data on the use of celebrities in the promotion of fashion brands. You are conducting a marketing research project to determine the effectiveness of celebrity endorsements in Louis Vuitton Moet Hennessy (www.lvmh.com). What secondary data sources have you found to be the most useful? As a marketing director at LVMH, how would you use secondary data that describe celebrity endorsement investments to determine whether you should continue to use celebrities in LVMH advertising campaigns?