Question: which celebrity has the biggest fan base?
Answer: 1 of 20. Beyoncé Larry Busacca/Getty Images for Coachella. ...  2 of 20. Taylor Swift. Efren Landaos/SOPA Images/LightRocket via Getty Images. ...  3 of 20. Cardi B. Arik McArthur/WireImage. ...  4 of 20. BTS. Kevin Mazur/Getty Images for SiriusXM. ...  5 of 20. Rihanna. ...  6 of 20. Justin Bieber. ...  7 of 20. Katy Perry. ...  8 of 20. Bruno Mars.