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The Saturdays singer was joined by her bandmates Una Foden, Vanessa White and Frankie Sandford, who donned their best fancy dress costumes for the evening.
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Birthday girl Rochelle chose to dress up as Princess Jasmine, while her husband Marvin Humes took the role of Aladdin.
Rochelle Humes makes a splash with adorable baby daughter Alaia-Mai
The couple, who are parents to ten-month-old Alaia-Mai, looked picture-perfect in their costumes as they posed for photographs outside London's Steam and Rye restaurant and club.
Rochelle's guests went all out with their outfits, with Vanessa White dressing as Esmeralda from The Hunchback of Notre Dame with her boyfriend Gary Salter as Captain Hook.
The Saturdays' Vanessa White turned to bandmate Rochelle for help with alcohol problem
Also opting for a pirate-inspired costumes was mum-of-one Frankie Sandford who went as Pirates of the Caribbean's Angelica while her footballer fiancé Wayne Bridge dressed as the Mad Hatter.
HELLO! Online blogger Una Foden looked stunning as Ariel, accompanied by her husband Ben Foden who was dressed as Tarzan.
Read Una Foden's blog for HELLO! Online
Una and Ben partied the night away knowing their daughter Aoife Belle was being looked after by Ben's mum who was visiting the couple for Mother's Day.
Rochelle was clearly thrilled by the lengths her guests had gone to with their outfits, tweeting "Thanks to all of my friends for doing me proud with the dressing up ❤️👍 EVERYONE went in! #hardorhome"
"I'm getting home at 5.45 am 🙈 Thank gawd it's Mother's Day!" she added after the celebrations had ended. "Daddy can do the morning feed 😂"
"Amazing night!" Replied One Direction's Niall Horan, who is a close friend of Marvin and Rochelle's. "Happy birthday mummy Roch! Love you @RochelleTheSats"
Notably absent form Rochelle's party was the fifth member of The Saturdays, Mollie King.
The blonde beauty tweeted her apologies to Rochelle, however, saying she was sorry she couldn't make it.
"Have a fab night @rochellethesats!" wrote Mollie. "I literally cannot WAIT to see all the photos, so sorry I can’t be there. Sure it’ll be one to remember 💛"