United Kingdom, March 26 -- Selena Gomez feels "sad" to read so many comments about her weight.

The pop star/actress, 32, has admitted she tries not to look at nasty posts on social media but she's "human" and "sometimes I read things" - insisting she "will never" look like a model and putting fluctuations in her size down to the medication she takes for chronic autoimmune disorder lupus.

During an appearance on the 'On Purpose with Jay Shetty' podcast, Selena explained: "This isn't news to anybody that obviously women have a lot more intense feelings from their appearance ...

"When I get prepared for an event, 90 per cent of the time I'm just like: 'I just hope I can take the picture and sit down' ...

"[I try not to look at comments ...