So on Black Light she conspires with hip-hop and pop producer-arranger Mike Elizondo on an album that seems designed to pay its respects to pop radio.

NPR: Rilo Kiley Will Try to Love You

But as long as hip-hop's hold on pop culture remains strong, the number of rappers crossing-over into the movies is expected to grow.

BBC: Rappers move into the movies

Kraftwerk were at the forefront of synthesiser pop and had a huge influence on hip-hop and dance music in the late 1970s and early 1980s.

BBC: Kraftwerk to play shows in Tate Modern's Turbine Hall