Rewrite the following question to reflect the standards and best practices of questionnaire writing:

Ariana Grande decided in 2013 to go vegan to live a healthier life. She stated, "I am a firm believer in eating a full plant-based, whole food diet that can expand your life length and make you an all-around happier person". Other celebrities like Natalie Portman and Liam Hemsworth have also made the change to a healthier lifestyle. How likely are these celebrities to influence people's choices about going vegan? How likely will it influence your decision?