Christina Aguilera, 45, wows in a plunging black gown as she joins youthful Eva Herzigová, 53, and Monica Bellucci, 61, at Prince Albert II of Monaco Foundation gala

Christina Aguilera wowed in a plunging black gown as she led the stars at the Prince Albert II of Monaco Foundation gala on Friday.

Eva Herzigová, 53, and Monica Bellucci, 61, showed off their youthful appearances in glamorous black dresses.

Celebrities gathered at the Opéra Garnier to celebrate the gala's 20th anniversary, with around 250 guests in attendance.

American hitmaker Christina, 45, stole the show in a thigh-high split gown with a sparkling neckline.

Czech model Eva oozed glamour in a strapless dress as she joined her new husband Gregorio Marsiaj.

The couple finally tied the knot this summer at the church of San Vito in Italy after 25 years of marriage.

Meanwhile, Italian actress Monica dazzled in a V-neck flowing dress for the occasion.

Hollywood icon Richard Gere, 77, looked dashing in a black tuxedo as he posed for photographs.

Italian film producer Monika Bacardi opted for a racy white cut-out number as she made her star-studded appearance. 

Eva and Gregorio first met in the Italian coastal village of Varigotti in 2001 and became engaged in 2017.

However, it is not her first marriage, as Eva, who is originally from the Czech Republic, was previously married to Bon Jovi drummer Tico Torres.

She shot to fame after starring in the famous 1994 'Hello Boys' Wonderbra campaign and went on to become one of the most recognisable models in the world, working with fashion houses including Louis Vuitton, Dolce & Gabbana, Dior and Chanel.

Gregorio belongs to a well-known entrepreneurial family in Turin, who founded Sabelt, a company specialising in safety systems for racing cars.

She spoke to Tatler about her relationship with the Italian businessman previously.

Eva said: 'He makes me feel so good about who I am, as I am. I have moments of not feeling good.

'But he always brings me up and out again. He is such a positive person and such a wonderful father. He fills my life with joy.'