Charli XCX thinks her modelling pose is a "little porno".

Charli XCX posing for House of Holland

Charli XCX posing for House of Holland

The 'Boom Clap' hitmaker is the star of House of Holland's new eyewear advertising campaign and as well as making pop music she has started to explore the fashion world.

Charli isn't always sure what she's doing when posing for shots and thinks she channels her inner X-rated star in front of the camera.

Speaking to the latest issue of i-D magazine, she said: "I'm not sure what my go-to pose is. I feel like I'm always throwing my head back a lot ... also I think I open my mouth a lot. It all sounds a little porno I suppose. To be honest, I never really know what I'm doing."

Charli believes she's taken her modelling cues from watching talent search TV show 'America's Next Top Model'.

She added: "I used to watch a lot of America's Next Top Model when I was younger ... perhaps there?!"

The 23-year-old singer has been friends with designer Henry Holland - who runs House of Holland - for quite some time and she had no hesitation in accepting his offer to be the new face of the brand.

She revealed: "I first met Henry at a party. He was DJing and playing some ultimate classics ... maybe Spice Girls or early 2000 J.Lo. We just hit if off from there I guess ... I'd been wearing his clothes and sunglasses for a while. I've always loved how vibrant and fearless his prints and designs were. When he asked me about wearing his sunglasses 'professionally', I was like yes this will definitely be fun

"My favourite sunglasses are the ones in the lead campaign image, because they are chic and sexy and cool. I kind of feel like I'm actually in Charlie's Angels when I wear them."