Woulda coulda shoulda been a(n):

• Ballerina
• Cheerleader
  
• Gymnast
• Olympic Athlete
• "Smart" person
  
• Rodeo Clown
• Musician (preferably a pianist or flutist - because they're both fun to say)
  
• Singer/songwriter
  
• Professional Chess Player (think Bobby Fischer)
• Acrobat
• Butter Cream Frosted Cupcake
  
• Cookie
• Cookie Monster
• Puppet
• Race Car Driver
• Stunt double
  
• Stunt double for ...Mr. T
• Mr. T
• Auto Mechanic
• Car Salesman
• Politician
• Hippie
• Siamese Twin
• Plastic surgeon
• Atmosphere
• Galaxy
• Ratio
• Rainbow
• Computer
• Post it note
• Glue