Sept. 4 marks a day that the Bey-Hive will never let pass quietly -- Beyoncé's birthday.

It's the day that the singer, songwriter, actress, mother, wife and mogul turns another year older, but you wouldn't know it by looking at her. And while 2019 will have the superstar ringing in her 38th birthday, photographers will probably snap photos of her unbothered, enjoying a luxurious vacation alongside her husband, Jay-Z, and three children, 7-year-old Blue Ivy and 2-year-old twins Rumi and Sir.

So, in honor of the day she was born, here are six little known facts about Beyoncé.

1. She's Allergic To Perfume: Despite having her own arsenal of fragrances, Beyoncé is allergic to most perfumes. However, the ones that she endorses, including her own, have been chemically altered to avoid a reaction.

2. Beyoncé Is The First Female Artist To Have Her First Six Studio Albums Debut At Number 1: That's right, every single studio album that she's made has debuted at number 1. The albums include, "Dangerously in Love" (2003), "B'Day" (2006), "I Am... Sasha Fierce" (2008), "4" (2011), "Beyoncé" (2013), and "Lemonade" (2016).

3. She Likes Butter Pecan Ice Cream: The mother of three shared a picture of the delicious frozen treat after spending some time in Atlanta. Apparently, Buttered Pecan flavored Blue Bell ice cream is the way to this diva's heart.

4. She's Battled Depression: When LaTivia Roberson and LeToya Luckett quit Destiny's Child and Beyoncé's father, Matthew Knowles, was sued for mismanagement, the young singer fell into a "lonely period" and stayed in her room and didn't eat.

5. She Almost Starred In The "A Star Is Born" Remake: It was Beyoncé and Clint Eastwood who had the roles of Ally and Jack but when the "Formation" singer got pregnant things took a different route, with Lady Gaga and Bradley Cooper taking over the roles instead.

6. She Donated Her "Cadillac Records" Salary: Beyoncé donated $4 million to the drug rehabilitation center Pheonix House, where she spent time preparing to portray the role of Etta James in the 2008 film.

Happy Birthday, Beyoncé!