Italian consumer groups have argued that Barbra Streisand's concert in Rome next month should be cancelled, saying that her show tickets are too expensive.
The Adusbef and Codacons groups have said that prices, which range from €150 to over €900, were "absurd and shameful".
They are asking that Rome and the Italian Olympic Committee withdraw permission for Streisand to perform at the Stadio Flaminio on 15 June.
In a statement released earlier this week, they said that the 24,000-seat stadium "is public property and cannot be used for immoral deals that are shameful to a civilised country."
This Rome date is the first of Streisand's Italian tour, which also includes her first date in Ireland.
She plays Castletown House, Co Kildare on Saturday 14 July. Tickets cost from €118.50 to €885.