Yeah most stars get calls. Manu gets them all the time.
Duncan, not nearly as much as most "stars," and that has been the case throughout his career. He always got the reach in called on the shot because people were dumb enough to do it. Other than that, Duncan has spent most of his career getting hacked repeatedly. The NBA refs have officiated him much the same way they did Shaq (let them pound him on offense, let him get away with some no-calls on D).