Mean $p_{\rm T}$ (top) as a function of sphericity for two multiplicity bins(left) $3 \leq N_{\rm ch} \leq 9$ and (right) $N_{\rm ch} \geq30$ for minimum bias pp collisions at $\sqrt{s}=7$ TeV simulated with four different MC generators: PHOJET, PYTHIA6 (tune ATLAS-CSC and PERUGIA-2011) and PYTHIA8. Also the contributions ofthe different event topologies to the averaged mean $p_{\rm T}$ are presented (bottom).