  In this paper, we study multiplicity results for double phase problems of
Kirchhoff type with right-hand sides that include a parametric singular term
and a nonlinear term of subcritical growth. Under very general assumptions on
the data, we prove the existence of at least two weak solutions that have
different energy sign. Our treatment is based on the fibering method in form of
the Nehari manifold. We point out that we cover both the non-degenerate as well
as the degenerate Kirchhoff case in our setting.
