As long as they're talented and put in good performances, I don't really care where they come from. Lady Gaga is really good. Harry Styles is okay, he can always get better.

David Bowie was great as Nikola Tesla in the Prestige and it's no surprise he was Denis Villeneuve's first choice to play Niander Wallace in Blade Runner.

Also studios and producers want to make money and if they think a singer is going to sell more tickets than that's what they'll go with.