Beauty is subjective, and what one person finds attractive another may not. There is no definitive answer to who has the most beautiful lips as beauty standards vary across cultures and time periods.
However, some individuals are often cited as having beautiful lips due to their symmetry, fullness, and shape. For example, some may consider Julia Roberts to have beautiful lips due to her naturally full top and bottom lip, while others may admire the shape of Angelina Jolie's lips. Ultimately, the answer to this question is entirely personal and based on individual preferences.