In an interview Ariana revealed that she was teased at school, she explained “I'm very petite and have really tiny boobs. That was a really big thing for me growing up. My friends were voluptuous and tall, unlike me." She used to think it was the reason she didn't have a boyfriend until she met a boy who would tell say "I like you just the way you are".
We never would have thought Ariana would have gotten teased, but almost every girl gets teased at least once including celebs like Ari.
(Thanks to wambie.com for the news)