Wearing a pink halter cowl neck bodysuit with completely open sides, the top is also totally backless. Already pretty risqué, ...

Keep scrolling to see what celebs like Ciara, Sofia Richie Grainge, Jennifer Garner, Katy Perry, Nicole Richie, and Paris Hilton wore to L.A.'s event of the season.

Katy Perry's enjoying the local cuisine in Mexico ... enjoying a taco fiesta with a big group of friends, gulping down the delicious dish.