I review the recent progress made in using holographic QCD to study hadronic contributions to the anomalous magnetic moment of the muon, in particular the hadronic light-by-light scattering contribution, where the short-distance constraints associated with the axial anomaly are notoriously dif cult to satisfy in hadronic models. This requires the summation of an in nite tower of axial vector mesons, which is naturally present in holographic QCD models. In AdS/QCD models this indeed takes care of the longitudinal short-distance constraint due to Melnikov and Vainshtein. Numerically the results point to larger contributions from axial vector mesons than assumed previously, while the predicted contributions from pseudo-Goldstone bosons agree nicely with data-driven approaches. However, a new puzzle has surfaced recently regarding the contribution of tensor mesons in hadronic light-by-light scattering.