Possible Clues:

• 1974 hit with Spanish lyrics
• 1974 Mocedades hit
• 1974 pop hit with Spanish lyrics
• 1974 top 10 hit with Spanish lyrics
• 1974 hit subtitled 'Touch the Wind'
• 1974 hit with a Spanish title meaning "You are"
• 1974 hit for Mocedades
• 1974 Top 10 hit for Mocedades
• Top-10 tune of '74
• 1974 foreign-language hit