Fans know Jaden Smith voices his opinion quite a bit on Twitter, but he's never been too vocal about other celebrities. As far as we knew, he didn't have any real issues with other stars. However, the rapper totally disproved this when he revealed that he used to hate Cody Simpson. We had no idea!

The 18-year-old publicly admitted that he was jealous of the Australian heartthrob when he first met him, and he let it affect their friendship. "I used to hate Cody Simpson because he got all the girls when I should have just shown my appreciation like I do now," he tweeted.

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It's been a while since Cody's been in the spotlight, but the 20-year-old dated Kylie Jenner back in 2011 and had an on-and-off relationship with Gigi Hadid for a while. He was even rumored to have dated Bella Thorne and Vanessa Hudgens's little sister Stella. It's no wonder Jaden thought Cody got all the girls!

Of course, the rapper's not the only star who used to hate one of his celebrity friends. Check out the gallery to see more celebs who went through a rough patch.

This story was originally published on Oct. 9, 2014.