Possible Clues:

• 'MMMBop' band
• Handicap conqueror Rick
• 'MMMBop' band, 1997
• "MMMBop" group
• Boy band with the hit 'MMMBop'
• 'MMMBop' boy band
• "MMMBop" band
• "MMMBop" brother group
• Group with the 1997 #1 hit 'MMMBop'