Highlights are a perfect way to add dimension to your hair, making it appear full and vibrant. When done right, hair looks like it's been kissed by the sun. When done wrong, highlights can give hair a striped, skunk-like look -- not pretty. Check out our fave and least fave celebrity hair highlights, then offer up your opinion: Did they go too far or are their streaks just right?

Blonde on top and dark brown underneath with dark roots showing? This "leave it" look doesn't need much explanation but just to be clear, highlights should enhance your natural look, not make your head look like a two-toned mess.

What do you think? Talk about the looks on our message boards.

Images: Getty Images, taken in Los Angeles on February 10, 2008, and in New York City on May 6, 2008

The pink streak is a fun look for a party or an event, but for every day? Something a little closer to your natural color is best.

What do you think? Talk about the looks on our message boards.

Images: Getty Images, taken in Los Angeles on November 18, 2007, and in Madrid, Spain, on June 26, 2007

Blonde is one thing, and she makes her "love it" look work, but blonde with yellow and black stripes? Yikes! Not the prettiest way to enhance your style.

What do you think? Talk about the looks on our message boards.

Images: Getty Images, taken in Los Angeles on May 14, 2004, and on May 6, 2008

For pink streaks, this "leave it" look isn't too bad. The pink almost blends in with the blonde. But we prefer Rachel with a more natural, golden hue.

What do you think? Talk about the looks on our message boards.

Images: Getty Images, taken in Los Angeles on January 28, 2007, and in Beverly Hills, Calif., on October 24, 2005