Gwen Stefani Pulls the Ultimate April Fools' Day Pregnancy Joke: 'It's a Girl!'

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Gwen Stefani has got some jokes up her sleeves!

The "Misery" singer took to Instagram on Friday to play into the April Fools' Day madness, posting a photo of a sonogram. If you look closely, you'll notice that it's a very zoomed-in photo, and nowhere on the picture does it share the details of her name, date or the numbers one normally sees on an ultrasound photo.

WATCH: Gwen Stefani Can't Stop Loving on Blake Shelton and It's Insanely Sweet

"It's a girl," she captioned it, with three heart emojis.

While the majority of her followers knew it was clearly a joke, the 46-year-old rocker definitely fooled a few gullible fans, with some writing things like, "Baby Shelton?!?" "Holy crap! I thought this was real," and "OMG OMG OMG, finally!!!!"

Clever, Miss Stefani, but you're not fooling us!

A few hours later, her beau, Blake Shelton, weighed in on the post, simply replying "Ha!!!!!" to a fan who tweeted, "April Fools prank shows that she and @blakeshelton have the same crazy sense of humor.... #matchmadeinheaven."

We're not surprised that the blond beauty would pull a baby joke like this one, however. Since coupling up with the country crooner last November, the two have constantly been in the spotlight. Last December, InTouch claimed that Stefani was pregnant with Shelton's baby, which the "Came Here to Forget" singer immediately shot down.

WATCH: Gwen Stefani Sweetly Shouts Out Blake Shelton in New Music Video

And this actually isn't the first time the No Doubt frontwoman has joked about her rumored pregnancy. In her music video for "Make Me Like You," she holds up a magazine that reads, "Gwen Pregnant With Alien Baby!"

See more highlights from the music video, which was taped live during a commercial break at the 2016 GRAMMYs in February, in the video below.