The 'Desperate Housewives' star thinks she's too young to start messing around with her face in a bid to slow down the ageing process.
The 39-year-old actress told France's Signé Beauté website: "I'd like to think I'm still too young for that. That being said, everyone does things differently."
Eva is just back from her trip to the Cannes Film Festival in the south of France, where she was once again one of the winners in the style stakes.
The star says dressing to suit your figure is the most important thing on the red carpet, so she always opts for skin-tight dresses to flatter her petite frame.
She explained: "You'll never see me in a huge, princess style dress. Because I'm petite, I like wearing body-con clothing. I like playing around with colour because I'm Latino.
"You'll never see me in black, either. My stylist usually suggests outfits to me and we discuss them together."
Eva still can't believe she is one of L'OREAL Paris' spokesmodels because she used to feel ugly as a child.
She said: "It was a big surprise for me because when I was younger I was the ugly duckling of my family."