Azimuthal correlations in Pb--Pb and pp collisions measured with the ALICE detector

We present results from the measurements of azimuthal correlations of charged particles in $\sqrt{s_{{}_{NN}}}$ = 2.76 TeV Pb–Pb collisions and $\sqrt{s_{{}_{NN}}}$ = 7 TeV pp collisions. In addition, the comparison of the experimental measurements in pp collisions with those from Pythia and Phojet simulations are presented.