Possible Clues:

• Top musical group of the 1990s, per Billboard
• 'End of the Road' vocal group
• "On Bended Knee" group, or a hint to the starred answers' first three letters
• Four-time Grammy-winning R&B group
• 'I'll Make Love to You' Grammy winners
• Band whose 1994 song 'I'll Make Love to You' was #1 for 14 weeks
• 'Motownphilly' band
• Pop group with the #1 hit 'End of the Road'