Four Diverse Cartoon Characters Smiling

Create an illustration featuring four diverse cartoon characters smiling and posing together in a circular arrangement. Change their clothing colors to blue, orange, green, and pink. Alter the hairstyles: the first character has curly hair, the second has straight hair, the third has short wavy hair, and the fourth has long, braided hair. Ensure the background is a bright, cheerful color that enhances the lively atmosphere of friendship.