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WASHINGTON, DC - APRIL 22: Jamie Cullum performs during "Jazz Legends At St. Regis", A Live Performance By Jamie Cullum at The St. Regis Washington D.C. on April 22, 2015 in Washington DC. (Photo by Kris Connor/Getty Images for Starwood Hotels & Resorts)

WASHINGTON, DC - APRIL 22: Jamie Cullum performs during "Jazz Legends At St. Regis", A Live Performance By Jamie Cullum at The St. Regis Washington D.C. on April 22, 2015 in Washington DC.  (Photo by Kris Connor/Getty Images for Starwood Hotels & Resorts)

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(MANDATORY CREDIT Ebet Roberts/Getty Images) Jamie Cullum, portrait, in New York City on November 25, 2014. (Photo by Ebet Roberts/Redferns)

(MANDATORY CREDIT Ebet Roberts/Getty Images) Jamie Cullum, portrait, in New York City on November 25, 2014. (Photo by Ebet Roberts/Redferns)

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BARCELONA, SPAIN - JULY 10: Jamie Cullum performs on stage during the first day of Cruilla Festival at Parc Del Forum on July 10, 2015 in Barcelona, Spain. (Photo by Jordi Vidal/Redferns via Getty Images)

BARCELONA, SPAIN - JULY 10:  Jamie Cullum performs on stage during the first day of Cruilla Festival at Parc Del Forum on July 10, 2015 in Barcelona, Spain.  (Photo by Jordi Vidal/Redferns via Getty Images)

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BERLIN, GERMANY - AUGUST 23: Jamie Cullum performs at Zitadelle Spandau on August 23, 2013 in Berlin, Germany. (Photo by Adam Berry/Redferns via Getty Images)

BERLIN, GERMANY - AUGUST 23:  Jamie Cullum performs at Zitadelle Spandau on August 23, 2013 in Berlin, Germany.  (Photo by Adam Berry/Redferns via Getty Images)

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SINGAPORE - APRIL 07: Jamie Cullum performs on stage during the Singapore Jazz Festival 2018 at Marina Bay Sands Event Plaza on April 7, 2018 in Singapore. (Photo by Suhaimi Abdullah/Getty Images)

SINGAPORE - APRIL 07:  Jamie Cullum performs on stage during the Singapore Jazz Festival 2018 at Marina Bay Sands Event Plaza on April 7, 2018 in Singapore.  (Photo by Suhaimi Abdullah/Getty Images)