Possible Clues:

• "Walk This Way" rap trio
• Pioneering hip-hop trio from Queens
• '80s hip-hop pioneers
• 'It's Like That' rappers
• First rap group on MTV
• First hip-hop group to have music videos on MTV
• Trio whose DJ was killed on October 30, 2002
• 2009 Rock and Roll Hall of Fame inductee
• 'Christmas In Hollis' group
• Pioneering rap trio