Lindsay Lohan

Lindsay Lohan has expressly denied having a breast augmentation. According to Showbiz News:

The 'Georgia Rule' actress - was reported to have had her breasts surgically enhanced after recently being photographed with a fuller cleavage - is fed up with the constant speculation about whether she has gone under the knife to boost her bust.

She is quoted as saying: "I like my breasts the way they are. I read that I had breast implants and that I'd had my lips done too, which is such b*****t."

The 'Mean Girls' star - who has previously been dogged by anorexia rumours - insists she has never been happier with her body.
She said: "I feel great. I like having a shape."

I'm likely one of the plastic surgeons she has read about. The photos I've examined from national magazines are pretty convincing, especially in regards to the lips. Breast augmentation, however, can be difficult to determine due to all the nice push-up bras nowadays.
It's like that 90's song by C&C Music Factory: Things That Make You Go Hmm....