Lewis Capaldi has declared himself “America’s Sweetheart” after landing his first US number one.

The Glasgow-born singer joked his ballad ‘Someone You Loved’ reaching the top of the Billboard top 100 meant he could “keep paying the rent for a few months”.

The song, which spent seven weeks dominating the charts in the UK, was a ‘sleeper hit’ in the States, taking 24 weeks to creep up the charts before replacing Lizzo’s ‘Truth Hurts’ on Monday evening.

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He becomes the first Scottish artist to net a solo US number one since Sheena Easton’s 1981 hit Morning Train (Nine To Five).

Capaldi, who headlined TRNSMT over the summer, told Billboard magazine: "I have no clue why this piano ballad has done what it's done."

"I never thought we were writing a big song here. I just wrote a song and, thankfully, people seemed to like it."

The 23-year-old admitted he still lived at home with his parents, but revelled in his new self-declared role as the darling of the US music scene.

He added: "I feel like America's sweetheart, at least for a moment, I feel like I'm the sweetest heart in all of the US of A."

"I feel like I'm a wrestler, and I'm just walking out [to the ring] and there's an American flag, and I'm saying, 'USA! USA!' That's what I feel like, a wrestler."

The song was streamed more than 25 million times during the last week, with an additional 105.6 million radio audience impressions, according to Billboard.

Capaldi said he learned of the song topping the US charts before a show in Madrid, though was forced to explain how he would celebrate to the American music site.

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He said: "After the show in Finland, I'm going to go home and get pished. P-i-s-h-e-d. That's what we call drunk in the U.K.”

"I'll probably be sick, sick in the toilet. And the next morning I'll have an upset stomach and I'll probably be really sad and like, 'Oh, why am I drinking at all?'”

"Then, the following day I'll be fine again. That's my plan, and it'll be lovely."