Amplitude analyses for CP violation at LHCb

Amplitude analysis is a powerful tool to search for CP violation effects both within and beyond the Standard Model. Examples are the analyses of ${\overline{B}}^0_s \to J/\psi \phi$ and ${\overline{B}}^0_s \to J/\psi \pi^+ \pi^-$, which can be used to measure the ${\overline{B}}^0_s$ mixing phase $\phi_s$, and $B^\pm \to D K^\pm$, which can be used to measure the CKM unitarity triangle phase $\gamma$. We review the status of such analyses at LHCb, including results from the $1.0~\rm{fb}^{-1}$ dataset accumulated during 2011.