US pop star Lizzo has sparked a body positivity debate after posting videos of her 10-day smoothie diet progress.

Axar.az reports that the Grammy-winning singer has previously been lauded for her body-positive stance, celebrating "big girls" on songs like Juice.

Now in a series of Tik Tok videos, she has charted her weight loss attempts.

Many fans have commended her efforts on health grounds, while others have criticized the star for encouraging "diet culture".

The conversation around Lizzo's weight was re-opened after she showcased her new daily diet results, saying it had made her feel "amazing".

Following reactions from fans, both positive and negative, she responded with a follow-up video, explaining that she was "proud of the results" and how "every big girl should do whatever they want with their bodies".