50 Cent "needed" to buy a $300,000 car moments before being interviewed by Nick Grimshaw for MTV

Nick - who was filming for MTV's Relentless Ultra Presents 'Soundchain' series - recalled: "We landed Friday night and then we went to film on Saturday and it was a really beautiful spring, summery day in New York. He was a little bit late and his people were like 'Oh he'll be here'.

"Then he came and was like, 'I needed to stop to buy something' and it was a $300,000 convertible Rolls Royce. But it was (said) as if it was 'Oh i needed some water.'

"He arrived in the Rolls Royce, actually drove himself there.

"I was quite intimidated because I loved him as a fan."

The 39-year-old singer then offered Nick, 30, a ride around the city and the star-struck TV presenter was amazed at how many people showed the New Yorker their love and admiration.

He said: "Then he took us out for a drive around in this car, and I mean he is so famous in New York.

"Every single person, everyone was running out of the shops and their buildings and there were kids chasing him up the road with no shoes on! And grandmas knew who he was, they were like, 'Fiddy I got you, I got you 719 Fiddy!'

"I don't know what that means.

"And then one random old man went 'Grimmy! Radio!' and 50 was dying."

The first episode of Relentless Ultra Presents 'Soundchain' with Florence and The Machine.

The remaining episodes then premiere across the MTV network on a biweekly basis.