Ariana Grande has insisted that she didn't get nervous when working with Harry Styles.

The One Direction man wrote the song 'A Little Bit of Your Heart' for the singer's upcoming album 'My Everything'.

Speaking to Nova FM, the US star said that the British heartthrob is a "sweet" lad.

When asked if she was nervous in the presence of Styles, Grande said:

"No! No, definitely not, he's a very, very sweet boy."

Denying any possible romance speculation, the 'Problem' star later added:

"He's just a friend."

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Watch the video for Ariana Grande's 'Break Free' below: