With two Grammy nominations and one of the year's biggest singles under her belt, Meghan Trainor can stand tall knowing that she is one of music's hottest rising stars.

But things didn't necessarily come easy for the 21-year-old singer. In an interview with the Daily Mail, Meghan's father, Gary Trainor, talks about the artist's hardship in growing up as a plus-sized child.

Gary, a former music teacher, revealed that Meghan struggled with body image issues throughout her childhood in Nantucket, Mass.

"I consider Meghan to be normal size, but when she was younger she was self-conscious about her body. She wouldn't go to pool parties as she didn't want to be the only girl in a one piece swimsuit when all the others were in a bikini."

He continued, "My wife Keli and I told her she had nothing to be worried about, but she was aware of her size. Most girls are very body conscious and Meghan was no different to others."

A childhood friend of Meghan's, Ashley Symer, told the site that it was the crushing rejection from a boy that partially served as the inspiration for 'All About That Bass.' Symer revealed that Meghan had a crush on a boy when she was 13, but he told her that he would only go out with her if she lost 10 pounds.

Eventually, however, Symer said that Meghan grew to accept her own self and beauty.

"Meghan eventually realized that she didn't have to bother to lose weight, that she did not have to change,' said Ashley. 'There is so much pressure on young girls to look slim. If we were going to the beach Meghan didn't want to go because she wouldn't be wearing a bikini and the other girls would."

According to Ashley, it was another music superstar who inspired Meghan to pursue her dream. "When Adele became famous Meghan was so happy because she wasn't the normal type of pop star. She really wanted to be like Adele."

We're sure that wherever he is, that boy that crushed her heart is kicking himself for letting her go.

A History of Memorable Celebrity Body Transformations