Cardi B revealed she is expecting her second child with her husband Offset during a performance at the BET (Black Entertainment Television) Awards in the US.
The chart-topping hip hop star, 28, took to the stage with Offset's rap group Migos and showed off her growing baby bump.
The couple are already parents to two-year-old daughter Kulture.
Following the performance, Cardi B shared a topless portrait on social media, showing her chest and bump painted white.
She captioned the post "#2!" and added a love heart emoji.
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This is not the first time New York-born Cardi B, whose real name is Belcalis Almanzar, has revealed a pregnancy on TV.
In April 2018, she announced the news during a performance on Saturday Night Live.
WAP rapper Cardi B and Offset, 29, wed in 2017 but their romance has not always run smoothly.
Their relationship was rocked by reports of his cheating and Offset took to the stage at Cardi B's Rolling Loud concert in 2018 to ask for forgiveness.
Cardi B filed for divorce in September 2020 but they later reconciled.
The BET Awards, which celebrate the achievements of Black performers across entertainment and sport, took place at the Microsoft Theatre in Los Angeles.
The BET winners:
Best Actress - Andra Day
Best Actor - Chadwick Boseman
YoungStars Award - Marsai Martin
Best Group - Silk Sonic
Best New Artist - Giveon
Best Female R&B and Pop Artist - H.E.R.
Video of the Year - Cardi B and Megan Thee Stallion (WAP)
Video Director of the Year - Bruno Mars and Florent Déchard
Best Female Hip Hop Artist - Megan Thee Stallion
BET Her Award - SZA (Good Days)
Album of the Year - Jazmine Sullivan (Heaux Tales)
Best Male Hip Hop Artist - Lil Baby
Best International Act - Burna Boy (Nigeria)
Best New International Act - Bree Runway (UK)
Viewer's Choice Award - Megan Thee Stallion and Beyoncé (Savage (Remix))
Best Collaboration - Cardi B and Megan Thee Stallion (WAP)
Best Movie - Judas and the Black Messiah
Dr Bobby Jones Best Gospel/Inspirational Award - Kirk Franklin (Strong God)
Lifetime Achievement Award - Queen Latifah
Best Male R&B and Pop Artist - Chris Brown
Sportswoman of the Year - Naomi Osaka
Sportsman of the Year - LeBron James
Source: Press Association