The image above was sent in by gamercatgirl before she started writing for the blog. Notice the little picture of the witches, Bloom. and Sky.
"It shows a picture (possibly a movie poster) of Sky and Bloom facing off against the Witches. I'm split on whether it's a cut scene from the first movie, something fun the creators decided to do, or a scene from the second movie." -gamercatgirl
Gasp! - It's Enchantix! It could be from the second movie, because in the end of the forth season, the girls are in their Enchantix forms again. Credits to dreamywinxgirl94 for posting it on MC.