Kate Hudson & Irina Shayk Rock Cleavage Cut-Outs, Michelle Rodriguez Goes Barefoot

Kate Hudson

Michelle Rodriguez

The celebs didn't hold back on rocking some serious fashion tonight in St. Tropez.

A number of stars gathered for Leonardo DiCaprio's annual auction gala in honor of his foundation on Wednesday in the south of France, and each one was dressed to the nines.

Supermodel Irina Shayk showed off her enviable curves in a striking Atelier Versace Haute Couture nude sheer dress with cleavage cut-outs. Kate Hudsonfollowed in the same trend by donning a stunning black gown with a cleavage cut-out and sheer accents.

Meanwhile, Michelle Rodriguez left little to the imagination by wearing a completely sheer black overlay with black undergarments. At one point, the Fast & Furious paired her sexy look with black heels, but decided to ditch them and go barefoot to give her feet a break. LOL!

Nina Dobrev was also in attendance, looking gorgeous as usual in a white Reem Acra gown with CSARITE by Erica Courtney gumdrop earrings.

On the guys' end, Orlando Bloom looked dapper in a crisp white dress shirt with a black blazer and black slacks. He toned down the outfit by not wearing a tie and choosing to rock some sneakers instead of dress shoes.

Meanwhile, the man of the hour, Leo DiCaprio, was decked out in a blue suit and also slicked back his hair into a man-bun (heyooo) and rocked some serious scruff.

In case you couldn't already tell, the Leonardo DiCaprio Foundation gala is becoming quite the star-studded event. Last year, a walk-on role in one of DiCaprio's upcoming films sold twice for $2.4 million, while Bono's personal guitar went for $1 million, following the singer's live performance at the event.

All proceeds go directly to LDF's environmental protection programs.

"Over the past year, we have expanded our conservation, public advocacy and direct-support programming to help preserve and protect wildlife in nearly every corner of our planet, but there is still much work to be done," DiCaprio said in a statement. "Today, only 12 percent of natural wild lands receive formal protection, and that number is drastically smaller for our oceans, which stands at less than 2 percent."

The foundation, which the star set up in 1998, is engaged in more than 70 projects across the globe, including the Elephant Crisis Fund and The Solutions Project to accelerate the transition to renewable energies.