Mouhieddine started her career in the corporate world in Lebanon aged 18 and moved to Dubai at 24 in search of better opportunities. Today, her luxury ready-to-wear fashion brand Lili Blanc has been worn by celebrities, including Rahma Riad, Balqees, Yara, Loujain Adada, Samira Said, Kelly Rowland, and Radhi Devlukia Shetty. Mouhieddine has over 82,000 followers on Instagram, and Lili Blanc has around 83,000 as of June 2023.