Girls' Generation's Jessica made a cute mistake on stage.

On January 5th, Girls' Generation made their comeback on MBC's 'Music Core' performing "Dancing Queen" and "I Got a Boy".

During "I Got a Boy", the members threw off their hats as part of their performance and immediately proceeded to their next choreography.

However, after throwing off her hat, Jessica stood there still posing, while rest of her members went on dancing. After realizing that the members had moved on to the next part of choreography, Jessica caught up to them naturally and continued to dance like a real professional.

Check out the performance of "I Got a Boy" here and pay special attention to 1:37. Did you catch her mistake?

Source+Picture: MyDaily via Nate