The diva, looking radiant in an orange asymmetrical gown by Lanvin, announced: "I have a surprise!" as she walked the red carpet.
She also performed at the awards, telling the crowd: "I want you to feel the love that's growing inside of me." Working autumn's boy-meets-girl trend (perhaps inspired by her own "If I Were a Boy?"), she sported a sequinned jacket, button-down shirt and high-waisted trousers by Dolce & Gabbana, and proudly ripped open her blazer at the end of her performance, revealing her growing baby bump.
We'll certainly be tracking Beyoncé's pregnancy style... Congrats!
Want more Beyoncé? Take a look at the artwork from the singer's latest album, 4.