Sphericity distributions in four bins of multiplicity: (upper-left) $3 \leq N_{\rm ch} \leq 9$, (upper-right) $10 < N_{\rm ch} \leq 19$, (bottom-left) $20 < N_{\rm ch} \leq 29$ and (bottom-right) $N_{\rm ch} \geq 30$ at $\sqrt{s}=7$ TeV. The statistical errors are displayed as error bars and the systematic uncertainties as the shaded area.