The mother of Louis Tomlinson's baby boy has branded the past year "the best and worst" of her life after facing repeated attacks from the singer's fans.

Los Angeles-based stylist Briana Jungwirth fell pregnant with her first child after a brief fling with the One Direction star, and they went public with the baby news last summer (15).

Briana gave birth to little Freddie in January (16) and as she prepared to celebrate her first Mother's Day on Sunday (08May16), she took to social media to share a short video of herself planting kisses all over her son.

In the accompanying caption, she wrote, "This past year has been the best and worst of my life. I was blessed with the most amazing gift- A beautiful baby boy that I grew inside of me for 9 months."

However, Briana also lamented the backlash she has faced from many of Louis' fans, some of whom went as far as to claim the child wasn't even real.

"On the other hand, I was scrutinized and harassed by thousands- which even included major media outlets whom all seemed to believe he wasn't real (sic)," she continued in the Instagram.com post on Saturday (07May16).

"I am beyond disgusted by it all. Being a new mom, I wanted to feel the joy and excitement and be able to share such a beautiful time of my life.

"For all of you who think doing this to myself and my innocent child is okay, you're highly mistaken. I also know that if it was said about you, you may not had the will power to hold back as much as I have. I will be strong enough to continue to embrace this journey, love my son endlessly and be kind to those who do not deserve it even if it's the last thing I'd like to do."

She concluded the note, "Happy Mother's Day to myself. I'm proud to be Freddie's mommy."