Cody Simpson Models with Ex-Girlfriend’s Sister, Bella Hadid, in Ralph Lauren Campaign

Cody Simpson is modeling with his ex-girlfriend's younger sister, 18-year-old Bella Hadid!

The 18-year-old Australian singer, who dated model Gigi Hadid, 20, was featured on the Ralph Lauren Denim & Supply fall 2015 campaign alongside several other young faces, who included model Hailey Baldwin, 18 and artist Tinashe, 22.

In the campaign, the group, all clad in laid-back, very American style clothing, are in a recording studio. Simpson is holding a guitar while some of the other models are holding some form of musical accessory, such as a microphone or drumsticks.

In a separate shot, Baldwin, the niece of Alec Baldwin, stands alone in front of keyboards. She is modeling a red floral, deep V-neck, maxi dress paired with a jacket, that is half off of her shoulders, and brown thigh high boots. Her bohemian looks is enhanced by several pieces of jewelry.

In Hadid's solo black-and-white shot, she is styling a long knit sweater over a breezy white lace skirt while holding a tambourine.

Aside from the modeling campaign, Simpson and Tinashe will be singing their own version of Charles Wright's "Express Yoruself" for the ads. Simpson uploaded a short clip of the musical collaboration on Instagram.

A video posted by Cody Simpson (@codysimpson) on Jul 8, 2015 at 11:51am PDT

Here is the full clip:

Simpson and Gigi dated on-and-off before they decided to part ways. Gigi is rumored to be dating Joe Jonas.