She wore her hair in loose curls as she posed in the hotel before heading to her friend Hermann Buehlbecker’s annual party.
"Great fun to be joining my friend @hermann_buehlbecker for his annual party in Cologne #germany," she captioned the snap.
Fans were quick to comment on Fergie’s stunning ensemble.
“This dress totally suits you!! Love, love, love,” commented one user.
“Now, that is a beautiful dress that really fits well,” shared another.