Two British journalists are among those sentenced in absentia by the Egyptian court which imprisoned three Al-Jazeera journalists for seven years.
Former ITN journalist Sue Turton, and Dominic Kane were sentenced along with laa Bayoumi, Anas Abdel-Wahab Khalawi Hasan, Khaleel Aly Khaleel Bahnasy and Mohamed Fawzi to 10 years.
A group of 16 Egyptian accused of being Brotherhood members, some of whom were also tried in absentia, were given 25 years.
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The singer had been tweeting in support of migrants when she was bombarded with abusive messages.
Ministers are reportedly considering plans in a bid to lower inward migration.
In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".