1213_amfar_launch What woman could possibly compete with Alessandra Ambrosio?!

The model stunned at 2013 amfAR Inspiration Gala in Los Angeles on Thursday, where she shined in a sheer nude Hugo Boss Fall 2013 gown. 

The Brazilian native attended the event with fiance Jamie Mazur -- the two looked great together as they posed for photos at the star-studded event. 

Alessandra recently opened up about her longtime love in Net-A-Porter's The Edit, where she revealed her jealous side. "I can be quite jealous," the  32-year-old says in the latest issue. "I come from a family where women are very strong. They rule the house and I’m the same."

Her jealous nature is the very reason she's chosen not to date a fellow celebrity. "When I see models with famous men, I think, that [is not] for me. I want a man to myself," she confesses. "There’s already competition for a normal guy, I’m not up to fighting other women off."

Regardless of who she dates, any man would be crazy to cheat on the brunette beauty. Uh, just look at her! 

The Victoria's Secret model wasn't the only big name at the amfAR event -- click "Launch Gallery" above to see Kelly Osbourne, Sharon Stone, Goldie Hawn, Cheyenne Jackson, Zoe Saldana, Kenneth Cole, Chelsea Handler and more. 

What do you think about Ambrosio's insecurity confession? Tell toofab in the comment section below!

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