Selena Gomez's fragrance bottle was designed with the help of a rehab facility and hand therapists

She told WWD: "I have dexterity problems from my lupus, so sometimes it's hard for me to open a bottle of water or do anything.

"Sometimes I've had to use a spray and, like, put both my fingers on it. It's not as sad as it sounds. I'm alive, and that's all that matters."

The 33-year-old star quietly tested the fragrance personally and used everyday moments to obtain reactions to the scent.

She explained: "It was really funny, because sometimes I would accidentally - I would accidentally or purposefully, I should say - get close to people and see if they could smell anything.

"I would just flat out ask everyone I was around. I would tell them what it is, and say, 'What do you think?'"

Selena - who is engaged to Benny Blanco - wanted to reflect her contentment in both her personal and professional lives with the fragrance.

She said: "Some of my best memories were when I was creating this, in our little test tube, when I got engaged, when I got to celebrate my birthday, 32nd birthday.

"It was just something that made me feel like a piece of me. And I wanted everyone to enjoy it. I was hoping that it would embody the place of life that I'm in."

Although Rare Beauty hasn't released a fragrance before, Selena released two scents through a partnership with Adrenalina Inc. when she was just 19 years old but she doesn't "even remember" what they were like.

She reflected: "I was so young.

"The sweetest thing - a few months ago, [I saw] someone had saved the box that my [first] fragrance was in. It's so long ago, I couldn't help but laugh, because it had just been a trying time in my life where I really was trying hard to be cool.

"I don't even remember what it smells like. I don't think it would be anything I'd wear now. This is definitely more me."