This week, the annual amfAR Cinema Against AIDS Gala took place at the 69^th annual Cannes Film Festival. In true Hollywood fashion, a number of celebrities graced the red carpet and caused a sensation with their stunning ensembles. From Katy Perry to Heidi Klum, here’s a closer look at the most beautifully attired stars from the evening.

Katy Perry

The 31-year-old songstress looked seductive yet sophisticated in a brilliant red Marchesa creation which highlighted her flawless figure. The voluminous crimson gown was decorated with Spanish inspired floral detail, a ladylike off-the-shoulder neckline and oversized puffed sleeves. For a finishing touch, Perry accessorized her gown with a pair of diamond chandelier earrings.

Karlie Kloss

With her statuesque proportions, the 23-year-old model was a stunning sight in a black off-the-shoulder gown. Also designed by Marchesa, Kloss’ floor-length number featured a fitted silhouette, thigh-high slit and fluttery accents around the signature neckline. Meanwhile, her dangling earrings, gleaming bangle bracelets and strappy metallic stilettoes wrapped up her style.

Heidi Klum

The striking German model may be 42 years old, but she looked positively radiant and ageless in a pastel yellow frock by Atelier Versace. The sunny, flowing number was accented with a deep V-neckline, trailing hem and daring slit. Not only did the colour flatter her bronzed skin and golden locks, it also emphasized her toned and lean figure. The ever-gorgeous Klum styled her dress with a silver and blue dangling statement necklace, which brought the attention to her décolletage.

Photos: Startraks