People have taken to Facebook to post messages on a page set up to pay tributes to Sarah Groves.
Underneath a photograph of her smiling, Charlene Carter said: "That beautiful smile I will never forget."
Donna Stacey said: "Waste of a beautiful life just goes to show the world we live in."
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In an embarrassing setback for the president, Republicans failed to reach the number of votes to pass his new healthcare act into law.
It will feel pleasantly warm in the sunshine, with temperatures reaching 12 or 13 Celsius (54 to 55F).
Some of Britain's biggest stars of the stage and screen will be honoured at Buckingham Palace later today.