Yahoo instant messager icon

Well I've notice the smiley icon in the notifications bar. Only comes up every time i reboot the phone. I remove it with Onekey terminator, it works fine but i don't feel like doing it every time i do a reboot. Just an annoyance not really a problem. Pretty sure its from Yahoo Instant Messenger. I used it for like 2 days for the first time then started seeing it up there. How can i get rid of it for good?