The reality TV star, who recently celebrated her 23rd birthday, posed in a black low-rise thong for her sexy self-portrait which she shared with her Instagram and Twitter followers.
Alongside the cheeky photo, Lucy wrote: "Who said I didn't have an aaaaassssssss."
The snap was a reaction to comments she'd received the day before concerning another picture of herself - this time in a white crop top and black trousers.
While many fans admired her monochrome outfit and her slim frame, others criticised her lack of booty.
But, after posting the shot of her peachy bum, fans wrote positive messages. One called her "an absolute goddess", while another said she had a "cracking ass".
We have to agree!
Lucy also shared a flawless close-up of herself showing off her fierce earrings.
The star wrote: "My new shark jaw earrings from my collection launching next week! #creature."
Her own exclusive jewellery line, Creature, is due to launch at the end of February.
She recently said: "I am concentrating on my new jewellery line, Creature. The name sort of says it all, but of course the collection is based around animals and their unique features."
Do you think Lucy Watson has a bottom to be proud of? Tell us your opinion in the comment box below!