Possible Clues:

• Gene Chandler doo-wop hit that starts with a solo bass voice
• 1962 chart topper for Gene Chandler
• The 'me' in 'nothing can stop me now,' in a 1962 #1 hit
• *1962 Gene Chandler hit
• "Nothing can stop" him, in a 1962 doo-wop classic
• Gene Chandler hit