Celebrities have been showing their bra straps on social media in a bid to get behind a campaign with an aim to raise millions to help prevent breast cancer.

Marks & Spencer are encouraging all of us to upload a cheeky snap to Instagram, Facebook or Twitter for #ShowYourStrap , nominate friends to do the same and donate £3 at the same time.

Rosie Huntington-Whiteley, Daisy Lowe and Denise Welch are among the stars showing their straps.

The campaign aims to raise £13 million for the charity Breast Cancer Now over the next five years to try to prevent 9,000 cases of breast cancer a year by 2025.

There’s also a new range of M&S lingerie – including a post-surgery bra for women who’ve undergone an operation. According to the charity, one woman is diagnosed with breast cancer every 10 minutes.

Made In Chelsea’s finest, Millie Mackintosh and Rosie Fortescue have got on board too.

As well as beauty blogger Lily Pebbles and vlogger Tanya Burr.

Rosie Huntington-Whiteley launched the campaign with M&S and modelled the new underwear range with breast cancer survivors.