A social media influencer has been rapped by the advertising watchdog over TikTok posts that 'trivialised' cosmetic surgery.

Millie Bracewell, 23, has been told off by the Advertising Standards Authority (ASA) after she created four videos about having a breast augmentation.

The mum-of-one became a TikTok sensation after track 'M to the B', released when she was 16, was used by stars like Kim Kardashian and Jason Derulo.

The first video, posted in August last year, showed staff at the Erdem Clinic in Istanbul, Turkey, waving at the camera using a sound from the Barbie film.

Millie, who has more than 1.7m TikTok followers, then created another post that featured her eating at the hospital and walking around Istanbul.

She posted a third video where she showed a surgeon measuring and marking her chest, before operating on her.

Millie then uploaded another post where she went to the clinic and discussed what it was like six days post-operation.

In three of the videos, Millie said in the caption that you could use her promo code 'millieb' for 20 per cent off any surgery or treatment.

Influencers are expected to tell social media users if they are being paid to promote a product on a post, by using something like #ad or #gifted in the caption.

But the ASA say the posts were not correctly identified as ads and they were irresponsible as they trivialised the decision to undergo cosmetic surgery.

The authority have ruled the ads must not appear again.

Millie told the ASA that the posts were not ads and that she was simply vlogging her journey to the clinic.

She also claims she hasn't received payment from Erdem Clinic and that her relationship with them was a normal customer relationship.

The influencer said she would 'never promote' that type of content to under 18s and that her audience was mainly adults.

She provided her audience age analytics to the ASA but there was no available data on followers who are under the age of 18.

Millie further stated that going forward she would be more careful and clear when organically showcasing her personal experiences.

TikTok confirmed that the posts under the investigation were not marketed, arranged or sold by the social media platform.

A spokesperson said that users were required to engage with their branded content disclosure tool, to identify the post as marketing communication.

However, the promotion of cosmetic surgery is prohibited so if Millie had used the tool, then the posts would have been rejected.

The Erdem Clinic did not respond to the ASA’s enquiries.

Millie Bracewell has been approached for comment.