Editors at TMZ.com claim Nick was asked to perform a show in Cleveland, Ohio, on 24 July (16) and offered $2 million (£1.5 million). The free gig was intended to be a thank you to the city for hosting the Republican National Convention earlier in July (16).

A private donor is said to have offered up the money to cover Nick's' fee, but the 23-year-old turned down the offer as he was already scheduled to appear at an event for Jay Z's Roc Nation label in New York City.

Nick wasn't the only pop star approached by Republican Party officials - Justin Bieber was reportedly offered $5 million (£3.8 million) to play a concert during the political convention.

The Canadian star turned down the lucrative payday, with sources citing his manager Scooter Braun's close ties to Democratic Party presidential candidate Hillary Clinton as one of the reasons for rejecting the gig.

Meanwhile, despite turning down the multi-million dollar gig, Nick joined forces with Demi Lovato on Friday (29Jul16) to hand out free tickets to their tour while in Kentucky.

Ahead of their concert at the city's KFC Yum! Centre in Louisville, the pair put on a treasure hunt for fans who had missed out on buying tickets to their Future Now joint tour.

Nick and Demi posted clues on Twitter, revealing they had hidden tickets at the Louisville Slugger Museum & Factory; a gold statue of Michelangelo's David; Waterfront Park; Louisville Slugger Field; and the Whiskey Row Lofts.

The Future Now tour is set to conclude on 17 September (16) in Inglewood, California.