Ashlee Simpson is the face of big sister Jessica's new season clothing campaign.

Despite having very different styles, Jessica picked Ashlee to front her latest fashion line, who told People her older sibling had an "amazing sense of style".

Ashlee said: "I have a pretty cool sister with an amazing sense of style, and I was honoured to get to do the shoot. We keep it in the family. Jessica's a fun one to work with."

She also collaborates with Jessica on the clothing brand but talked about their different tastes.

"Jessica's a bit more girly, and I kind of like to bring an edge to my looks," she said. "I do like to be in dresses, I just like to toughen it."

But their mum Tina Simpson thought there was a more basic reason for her daughters' different looks.

She said: "Ashlee's boobs aren't as big!" to which Ashlee replied: "True that!"