GROUPS COME in all shapes and sizes. Although the design team from Extreme Makeover: Home Edition and a hip-hop dance crew might vary in size and purpose, both are considered groups. (top left) David Furst/AFP/Getty Images; (top right) © 20th Century Fox Film Corp. All rights reserved. Courtesy Everett Collection; (bottom left) AP Photo/Vail Daily, Shane Macomber; (bottom right) ABC/Photofest