Britney Spears Shows Off Her ‘Small Belly’

Britney Spears is wasting no time showing off her "small belly." The 40-year-old pop superstar bared her midriff in a minute-long Instagram clip on Tuesday (April 12) night, just a day after she announced that she and her fiancé, Sam Asghari, are expecting a baby.

"So I have to model my clothes now before I really start showing," Spears captioned the video which is set to Ace of Base's hit 1992 song, "All That She Wants."

"I had to do the flower on my neck like @sarahjessicaparker," she continued. "I actually do have a small belly here but at least my pants fit… Well barely!!! Psss is anyone curious why I’m 4 sizes smaller by the door."

In the video, Spears models everything from a sexy floral crop top to a full outfit that resembled her iconic look from her 1998 "Baby One More Time" music video. While she tries on the many outfits, the lyrics "all that she wants is another baby," play over and over in the background. "ITS THE SONG CHOICE FOR ME," wrote one fan.

Britney's pregnancy announcement on Instagram read: "I lost so much weight to go on my Maui trip only to gain it back… I thought ‘Geez… what happened to my stomach???’ My husband said, ‘No you’re food pregnant silly!!!’ So I got a pregnancy test… and uhhhhh well… I am having a baby… 4 days later I got a little more food pregnant It’s growing !! If 2 are in there… I might just lose it… I obviously won’t be going out as much due to the paps getting their money shot of me like they unfortunately already have…” Spears wrote. “It’s hard because when I was pregnant I had perinatal depression… I have to say it is absolutely horrible… women didn’t talk about it back then… some people considered it dangerous if a woman complained like that with a baby inside her… but now women talk about it everyday… thank Jesus we don’t have to keep that pain a reserved proper secret… This time I will be doing yoga every day!!! Spreading lots of joy and love!!!”

Asghari, 28, also posted to Instagram, saying “Marriage and kids are a natural part of a strong relationship filled with love and respect. Fatherhood is something I have always looked forward to and I don’t take it lightly. It is the most important job I will ever do.”

Britney Spears' pregnancy announcement today (April 11) has sent her fans and the internet in a tizzy. The pop superstar's fiance Sam Asghari suggested she was having a "food baby," but -- as she told us in her Instagram post -- she learned that she was actually pregnant with the couple's first child!

Check out what fans had to say on Twitter below: