The reality star cosied up to her popstar husband Kevin Jonas at the H&M and Vogue Studios Celebrate event in New York on Friday, 6 September.
Danielle teamed her flirty dress with sky high black heels and a belt around her waist, which disguised any hint of a baby bump.
Danielle and Kevin announced their first pregnancy in July, with Kevin saying: "You can't even imagine how excited we are. I can't wait to share this with my best friend."
Then, in August, the parents-to-be revealed their first born will be a baby girl.
Danielle and Kevin have been sharing plenty of their pregnancy with fans, uploading sonogram images to Twitter and keeping them updated on Danielle's progress.
The couple met while on holiday in The Bahamas with their families and went on to tie the knot in a fairytale-themed wedding in New York in December 2009.
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