(English is not my native language; sorry if u find misspellings).
I'm not sure.. But I think the 4th season is just a rumor T-T
I searched in many websites... And I think it's all false. Between the seasons, there's just 1 maand of break (I'm not sure if I'm saying this right, but I think you're understanding what I mean.. if u didn't understand, I'll try to write in another way ^_^). The last episode aired on March 26, 2010 - And now is 2012. So.. I think there's no 4th season ;'(
But if u really want a fourth season, sign this petition: link I already signed - I think u should sign too :D
And if u didn't like the ending in the anime, u should read the manga. The ending is waaaaay better. I think you're going to like it *-*
No,But i find in somewhere they zei there a season named SHUGO CHARA LOVELY the main chara is not amu but kirameki hikari of somewhat just type shugo chara lovely if u want zoek it please tell me the answer!!!