What Comes In Three?
But and here are the tricky part. They must not be a unit that are tied together. Lost? Here are some examples.
I cannot go as "G", wuboy "R", and M&M "X". Because then we have to stay together to make GRX make sense. So the order is important. Also if possible it should include a girly part ot the three as M&M is a...girl.
The winner will get a picture of the three of us with the winning names on our tee-shirt and our shiny medals. 
Id, Ego, Super-Ego
1, 2, 3
A, B, C
Do, Re, Mi
7, 11, 13 - Prime Numbers
3 Musketeers.
Shoe, Sole, Laces
I saw this one before, a big mac meal. (big mac, fries, soda)
Eugene, Eugene, Winnie. (haha)
Die Hard trilogy...
Just three different pictures of Bruce...
Indiana Jones Trilogy...
3 judges from American Idol... boo...
The Holy Family: Jesus, Joseph and Mary
A New Hope: Luke, Han and Leia
The Matrix: Neo, Morpheus and Trinity
The Smurfs: Papa Smurf, Brainy Smurf and Smurfette (or any 2 Smurfs with Smurfette)
The Good, The Bad, and The Ugly (you would have to sort this out amongst yourselves)
The Usual Suspects: Keyser Soze (a must!), McManus, Hockney, Keaton, Kobayashi... :)
Sex and the City - Carrie, Mr. Big, Aidan
:)
Laverne and Shirley - she can be anyone, and the guys can be Lenny and Squiggy!
Lucille ball, Ricky Ricardo and Fred
The flintstones! Betty, barney and fred!
three stoogies...you guys can bop each other!
Peter, Paul, and Mary... thinking the singers?
Drew: big mac fries and soda? i haven't had a big mac for a long time and after super size me won't for awhile. :)
Arv: Star Wars characters...that would be cool. I like your smurfs idea best!
Judyjudy: Usual suspects...ooh! We'll run around in circles...just like the movie. Kobayashi is uber-cool.
Jen: 3 Stooges...are there girls in that? We'll bop each other regardless. Watch OUT!!!
Kat: PPM...thinking the apostles and Mary. Never heard of them as singers.
Thanks all for your suggestions. Hehe that was fun!