How To: Apply colorful hair extensions yourself to blend seamlessly into hair

After a long dry spell, Katy Perry has officially breathed new life into multicolored hair extensions. Once only the playthings of prepubescent girls who thought it made them look all cool and rebellious like, extensions are now favored by several A-list stars.

The key to looking mature instead of like you're going to your middle school's dance is moderation and seamless blending. Check out this video to learn how to apply hair extensions yourself.