On Friday's broadcast, the 31-year-old sat down with Rylan Clark and Ruth Langsford, two other X Factor alums, to talk about her newest work.
However, viewers at home were captivated by Lucy's switch from brunette to blonde."Omg Lucy Spraggen looks hella different, I suppose in 10 years is a long time," one person said.
"I can't believe how much Lucy Spraggan has changed," said anotheer. "I can't believe how different Lucy Spraggan looks," a third person added.
Lucy played Last Night, an original song about feeling "beer dread" after having too many beers the night before, at her renowned X Factor audition.
However, Lucy claimed that she has been tee-total for three years during her conversation with Rylan and Ruth.