The 37-year-old star and her fellow bandmate, wore their old outfits from the 1990s at a friends' event, reported Contactmusic.
"Me and Mel C went to a fancy dress party recently and I went as Baby Spice and she went as Sporty Spice. We got all the old dresses out and it was hilarious!", Bunton said.
"It was very funny and we took lots of pictures. It was really good fun. Inspite of people mocking us, we got a good response and it went out really well", she quoted.