What is a good group halloween costume for three 15 yr olds?

I would go with the Scooby Doo Gang. They're cute/hot and people enjoy them.

beyonce single ladies, i might be doing that with my friends

Monica, Phoebe and Rachel=)

tin man, need silver spray paint, cardboard ( coke cartons are ok), funnel (dollar store), grey face paint. put on grey sweats, cut and spray paint cardboard cuttings, make arm bands, thigh covers, etc. The film version was made of 40 pounds of aluminum. scarecrow- blue work shirt jeans, cowboot boots, gloves, rope. fold the shirt over each side like a bathrobe. secure with a rope belt. fold the jean legs up to mid calf, and lay over boot tops. In the books scarecrow wore only blue. buy a wire brim witch hat (dollar store), fold in the top of the cone, and fold up the brim. put a bit of brown on the nose, and shredded newspaper for straw. You will require a brain. Study ray bolger's work, and movements. .... and when the parties over, scarecrow.. (sob) i'll miss you most of all. dorothy is self explanitory, no rosy cheeks, you'll look stupid.

Depending on if it's boys or girls...Cheetah girls/Jonas Brothers A mix could be the three monkeys:Hear, See, and Speak no evil. They could be a rock group...I dunno, punk/goth band. That's all I have without knowing the sex of the kids.

3 STOOGIES 3 MUSKETEERS 3 BLIND MICE 3 LITTLE PIGS JAIL BIRDS

Cheerleaders, band members with different instruments, simple animal costumes (like cat ears and whiskers), wizard of oz characters (you can make the costume idea more feminine) the witches from hocus pocus, cinderella and her two step sisters, different princesses, or even just similiar styled costumes like dresses, but all different in theme.

animals are always fun =] racoons/bears/cats etc =]