Ariana Grande took to Instagram to joke about rumors saying she had a boob job. The "Yours Truly" singer showed off her "fuller chest," wearing a Victoria's Secret push-up bra in a new video.

According to Entertainment Wise, Nathan Sykes' 20-year-old girlfriend gave an up close and personal look at her cleavage while mocking the speculation.

[For the video, click HERE.]

The "Sam & Cat" star, who was romantically linked to Justin Bieber earlier this year, had no problem with laughing at herself. She told her fans that the bra was making it look like she had amble assets.

"Oh my God, you guys - Ariana Grande got a boob job," joked the brunette singer.

But she quickly set the record straight and slammed the plastic surgery rumors.

"It's a Victoria's Secret push-up bra," added Grande. "False advertisement just like the rest of America, children."

The starlet may shop at VS, but she also lets her stylist pick out her outfits. Grande doesn't buy her own clothes at times.

"Brigitte, my stylist, always turns up with her arms full of cool outfits," admitted the rising star to the Daily Mirror in November. "I don't even know where she gets them from."

But later, the singer learned that her stylist gets her ensembles from a sex shop, confessing to the newspaper.

Think Grande's way of slamming the boob rumors was cute or not? Tell us your thoughts in the comments section below!