The makers of Allu Arjun-starrer Telugu actioner “Sarrainodu” have erected a set worth Rs.1.5 crore to shoot a special song featuring the film’s lead pair. The song is being shot here over the last two days. “A special number featuring Arjun and Catherine Tresa is currently being shot in this Rs.1.5 crore set in Annapurna 7 acres studio. It also features over 300 dancers matching steps with the lead pair. The song is expected to be wrapped up in the next three days,” a source from the film’s unit told.