The 25-year-old actor plays Ig Perrish, who can read other people's minds, in fantasy thriller 'Horns' and would love to use them on the 'Baby' hitmaker, reported Contactmusic.
When asked who he'd like to use Ig's power on, he said, "Maybe Justin Bieber. Just because you hear so much stuff about him that you are just like, 'I want to really know, I want to get to the bottom of this!' And with horns, I would be able to."
Meanwhile, Radcliffe recently revealed that his girlfriend Erin Darke is a big fan of the horns he wore in the movie.
"She loves them. How could you not They're glorious and I hope very attractive," he had said.
According to the actor, things are going great between the couple, who met in 2012.