Possible Clues:

• Second-longest-running Broadway musical ever (after 'The Phantom of the Opera')
• Young ''señorita''
• Friend for un muchacho
• Young amiga
• Spanish term of affection between young women
• Quinceanera celebrant
• Girl, in Guadalajara
• Synonym for 'muchacha'
• Quinceañera honoree
• Guatemalan girl