Though plastic surgery is as common as blond hair dye in Hollywood, it's also declassé to talk about it. Below, 6 celebs who have publicly denied getting breast implants, although a few eventually 'fessed up.

Britney Spears. When 17-year-old Britney was first topping hearts with her Lolita-esque brand of innocence and sexy pop songs, the star swore up and down that she hadn't gotten surgery, attributing her suddenly overflowing bust to a normal teenage "growth spurt."

But a 2008 issue of Rolling Stone revealed that Britney's mom had taken her to get the implants as a teen: "She regretted the implants, particularly because her chest was still growing," a friend says. "When her natural breasts became larger, she had the implants removed." But Spears kept the surgery a secret. Adds the friend, "When other girls did their boobs [they admitted it] and moved on, but Britney was brought up to lie about herself."

Audrina Patridge. "The Hills" star has denied getting her ta-ta's pumped up: “It’s important to have your own look and keep what you’re born with, it’s not something I’m going to do any time soon.” Yet pictures like the one above display some wonky cleavage. Hmm...

Lindsay Lohan. Despite an almost overnight chest puff-up, The Lo told Cosmo Girl in 2005: "I developed very late in high school. When I was 16, I still had baby fat. I didn't get my chest until I was 17, so that made me feel insecure. I used to feel like I had to stuff my bra."

Victoria Beckham. In January 2000, Posh insisted to a TV reporter: "I haven't had a boob job." She finally admitted to it in conjunction with a libel suit, but really, anyone with eyes could tell those things weren't handed down from above.

Jessica Simpson. As she dished to Bazaar: "I’ve had none [plastic surgery]. But you know, my boobs are real… People have said that I’ve had things like a jaw replacement or implant or something. I’m photographed every day of my life and have never worn bandages or anything, so how could that be right?" Later, father Joe Simpson famously raved about his daughter's double-D's. Ick.

Kim Kardashian. Though she admits to Botox injections, Kim swears her boobs are natural, telling a reporter: “Trust me honey. if I take this bra off you will tell me I need to get them done.” Pssst: Sister Kourtney does admit to getting implants.