The girls braved the cold in short hemlines, but weren't short of male friends to help them warm up. OOH ERR.
Dionne looked beautiful in a white and silver shift dress with matching strappy heels, and her red nails made her outfit pop.
"Had the most amazin night! Thank u everyone who came!..best night ever!" Dionne tweeted.
"Now with my fd boys gonna party so more at the hotel! xx"(sic)
Joined by mate Pixie Lott and her boyfriend Oliver Cheshire, the girls had a belated celebration after Dionne's actual birthday on February 1st.