Music
ITV / Rex Features
The three X Factor acts will all perform during a 90-minute show after the racing at the venue on July 11, with tickets available in advance for £13.
Hamilton Park Racecourse chief executive Vivien Kyles said: "We were determined to bring a high-profile crowd pleaser to the racecourse this year and we're absolutely delighted to have surpassed this by confirming three major acts on a single night.
"The X Factor is a pop phenomenon and we're sure bringing JLS, Ruth and Diana to Hamilton will generate a memorable atmosphere at our already hugely popular Family Night."
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