According to Google Trends, AC/DC has a higher search volume than Demi Lovato in the United States, Canada, the United Kingdom, Australia, and New Zealand. This means that more people are searching for information about AC/DC than Demi Lovato.
AC/DC also has a larger social media following than Demi Lovato. On Facebook, AC/DC has over 28 million followers, while Demi Lovato has over 30 million followers. On Twitter, AC/DC has over 5 million followers, while Demi Lovato has over 22 million followers.
Finally, AC/DC has sold more albums than Demi Lovato. According to Wikipedia, AC/DC has sold over 200 million albums worldwide, while Demi Lovato has sold over 22 million albums worldwide.
Therefore, it is clear that AC/DC is more popular than Demi Lovato.