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Heart Breakfast with Jamie Theakston and Amanda Holden 6:30am - 10am
The X-factor finalist will be appearing at Norwich's waterfront on Sunday, May 16.
Diana appeared in X-factor alongside the like of JLS, Ruth Lorenzo and Eoghan Quigg.
She spoke to Heart's Angie Clague about her solo career, tour and keeping in touch with her X-factor friends...