Kelly Osbourne joined the belfie club with her latest Instagram snap.

We’re very happy for Kelly, after she dropped just over a stone in the last four months with a new fitness regime.

But maybe the Fashion Police star could have come up with a more…subtle way to show off her her toned bum!

The 29-year-old was centre of attention just days ago when she showcased her purple safety pin hairstyle.

Wearing a tiny pair of pink knickers, the celebrity captioned the snap, “It’s not a #FullMoon but it feels like one.”

Kelly said she piled on the pounds after she split from her fiancé Matthew Mosshart six months ago, but is said to be doing Pilates and yoga classes and hired a personal trainer five days a week to help her keep in shape.

Good for you Kelly!