Ariana Grande is the September 2014 cover girl for Seventeen magazine and opened up about her blossoming career, her biggest fan and the toughest thing she's dealt with in life. The 21-year-old has seen her music career suddenly take off but the road to stardom hasn't always been easy for Grande.

Recently she told fans via Twitter that her grandfather had died (when the interview with Seventeen was conducted her grandfather had fallen ill), and she revealed to the magazine that she is estranged from her father. Despite many setbacks and obstacles Grande is determined to stay positive.

Check out some of the interview highlights below:

Getting over her insecurities:

"Everybody has certain things that make them feel insecure. Even when you overcome a huge battle in your life and you make a ton of progress as a person, there are still things that will upset you and break your heart. But I feel like I'm at a point in my life where love is the most important thing, and I won't let anything come before it."

On making her fans a priority:

"If my fans want something, I'll always do my best to give it to them. A lot of my fans are in love with my old music, and they're always asking me if they can have the songs that didn't make it on the first album. I had to buy ["Boyfriend Material"], so I could just give it to them for free. I really wanted them to have it because they love it!"

On how her grandfather was her biggest fan:  

"He was like, 'you're a star, I know in my heart you're going to make this family so proud. You're a blessing.' And I was like, oh my God, and started crying and I trusted it."

The hardest thing she had to deal with:

"Falling out of touch with my dad. It's private, but it happened last year. It took me so long to be ok with it. The thing that got me there was embracing the fact that I am made up of half my dad, and a lot of my traits come from him. So much of me comes from my father, and for so long, I didn't like that about myself. I had to accept that it's ok not to get along with somebody and still love them."

Biggest life lesson:

"Being ok with not having the answers to everything. I feel like for the first time in my life, I'm really ok. I used to freak out about everything all the time. I used to be like, 'Oh my God, somebody said this!' Everything used to be such a big deal. But now, I feel I can handle everything that comes my way with a calm energy."