Winx Club is an Italian television show for kids that features a young girl named Bloom. One day while playing with her pet in the park, Bloom comes across a fairy fighting off some ghouls and a troll, and when she tries to save her she discovers that she has magical powers. The fairy, Stella, tells Bloom to attend a school for fairies called Alfea and Bloom takes this advice, after a troll attack on her home. Once there, Stella and her other room mates (of which Stella is one) go around fighting evil, which is caused by some witches. There is also a school for heroes on the other side of the forest and bloom and friends bump into them occasionally, they eventually become love interests.
The show is very girly. There are cute animals and the girls are somewhat fashion obsessed, but the fairies do fight crime so there’s some action in there. The creator wanted this series to be somewhat like sailor moon, and knowing this you can definitely see the similarities when watching the show. According to Wikipedia, there were two North American releases, one by Cinélume and one by 4kids Entertainment. Of the two, 4kids Entertainment apparently changed the music, dialogue and some of the situations, so if you or the young kids in your life want to watch this show I would suggest looking up the one by Cinélume.
http://www.youtube.com/watch?v=b9pxGB4_ki8&feature=fvsr This is the 4kids version.