Cosmetic Surgery is defined as surgery that modifies or improves the appearance of a physical feature, irregularity, or defect.

The number of teens who choose to get plastic surgery is on the rise. According to the ASPS, over 333,000 people 18 years and younger had plastic surgery in 2005, up from about 306,000 in 2000.

These surgeries are legal for people under 18.

Otoplasty: Pinning back very big ears. Often performed on kids as young as 5.

Correction of Breast Asymmetry: When one breast is much bigger than the other, doctors might address the difference by reducing the bigger one, augmenting the smaller one, or both.

The following popular surgeries should wait until adulthood.

Breast Enlargement: Only adults should be stepping up their breast size - until 18, breasts might not be fully developed, and saline-filled breast implants (the type typically used for cosmetic enhancements) aren't even approved for under-18s

Liposuction: The body is still changing during the teenage years so youngsters should focus on other slim-down strategies, such as an exercise program coupled with a low-calorie, low-fat diet.

Breast Reduction: Very large breasts can be a burden to teenagers by causing them to be self-conscious, as well as physically uncomfortable. Unless the problem is overwhelming, though, many doctors recommend waiting until at least age 18, when the breasts have stopped growing and the outcome is expected to be best.