This study constructs a model to predict ad attitude when AI influencers act as ad endorsers. In the results, search products and rational ad appeal have more positive ad attitude, perceived empathy and perceived expertise as mediator. These three variables can be reinforced by the consistency of ad appeals and product categories.

The purpose of this research is to explore the factors that affect a celebrity’s perceived authenticity on social media sites. In total, 653 Taiwanese consumers were recruited to examine the proposed model. The findings generally support our model. The theoretical and managerial implications of this study are discussed.