Charlie Puth underwent vocal surgery

Charlie Puth has revealed he had undergone nasal surgery to correct his septum and says it means he can "sing better now".

The 26-year-old singer said he was not going to share the news but eventually decided against it.

"I had nasal surgery to correct my septum, and nobody knows I had surgery. I can sing better now. I was never gonna tell anybody, but I can tell people. If Kylie Jenner can tell everybody..." Puth told Vanity Fair magazine.

The "We don't talk anymore" hitmaker added his first album, 'Nine Track Mind' was akin to "printing lottery tickets" as all the songs sounded different.

"The first record's elementary chords. I'm just getting my foot in the door, I don't know what I'm doing as an artist. That's why (the songs) 'Marvin Gaye', 'One Call Away', 'We Don't Talk Anymore' don't sound anything alike. I'm printing lottery tickets," he said.