Meghan Trainor surprised fans with a shocking weight loss transformation.

The 31-year-old singer debuted her thin figure at the Billoard Women in Music event on Saturday, March 29th.

The Mother hitmaker stepped out in a glamorous, all-black outfit with a strapless bodysuit paired with a sheer, tulle skirt, as per DailyMail.

The songstress opted for a sheer lace shirt paired with a velvet bodice and ruffles, which she accessorised with knee-high socks and patent leather.

Trainor completed her look with slingback pumps, for the red-carpet event.

The All About That Bass singer’s latest appearance added to the already viral speculations about her recent weight loss.

Fans theorised on social media that Trainor used the weight loss drug Ozempic to aid her transformation.

Trainor, who has previously been open about her cosmetic surgeries, has not addressed the Ozempic speculations.

In December, on her Workin’ On It podcast, she said, “I got too much Botox, and I need help. I messed up,’ she confessed. ‘Everywhere I go, I cannot smile. My face hurts to smile.”