Smoke billowing from timber doors welcomed the Minnesota Vikings to the Wembley field ahead of their clash against the Pittsburgh Steelers this evening.
The teams tweeted video and pictures of the atmosphere from the ground before kick off.
More top news
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".