Can Britney Spears succeed in mobile games where Katy Perry failed?

Star's American Dream game comes from publisher that made Kim Kardashian a mobile hit, but missed the hit parade with their last pop outing

In 2015, global music sales were $15bn (10.3bn). Yet the three biggest mobile games companies alone - Supercell, King and GungHo Online - made $5.6bn between them, out of an estimated $30.4bn for the overall mobile gaming market.

Britney Spears: American Dream is the latest experiment to see if music can capitalise on a world where many people are happier to spend their disposable income on Candy Crush Saga or Clash Royale rather than on music.