Egyptian singer Sherine Abdel Wahab has been sentenced to six months in prison for joking about the cleanliness of the River Nile.
Sherine, one of the country's most famous singers - and a judge on the Arabic version of The Voice TV show - told a fan that drinking from the famous river might give them parasites.
"Drink Evian instead," she joked.
Another singer, Laila Amer, was also sentenced on Tuesday to two years in prison over a music video.
Ms. Amer - who is not as well known as Sherine - was found guilty of "inciting debauchery and immorality". The director and another actor were sentenced to shorter terms.
Sherine, meanwhile, has been convicted by a Cairo court of spreading false news.
Egyptian news outlet Ahram said she was ordered to pay 5,000 Egyptian pounds (£204) as bail, in addition to a fine of 10,000 pounds and remains free until her case is concluded.
Both cases remain open to appeal.
A 'foolish joke'
The lawsuit against Sherine was filed in November after a video emerged online showing her being asked to sing Mashrebtesh Men Nilha (Have You Drunk From The Nile?)
She responded by saying "drinking from the Nile will get me schistosomiasis" - a disease commonly known in Egypt as bilharzia, which once plagued rural water sources.
On top of the legal case against her, the Egyptian Musicians Syndicate announced that it had banned her from performing over her "unjustified mockery of our dear Egypt".
Abdel Wahab later apologized for her "foolish joke" at the concert, which she said took place in the United Arab Emirates more than a year ago.
"My beloved country Egypt and sons of my country Egypt, I apologize to you with all my heart for any pain I may have caused you," she added.
Schistosomiasis was widespread throughout much of Egypt's history, having been discovered in mummified remains from thousands of years in the past. Health programmes in the last century, however, have greatly reduced its prevalence.
It is caused by a parasitic worm that lives in fresh water in subtropical and tropical regions, growing inside the human body.