Possible Clues:

• 1990's boy band, initially
• Donnie Wahlberg band (Abbr.)
• Mark Wahlberg's brother's band, briefly
• Donnie Wahlberg band, for short
• '80s Boston boy band
• Jordan Knight band
• "Step By Step" boy band, for short
• Joey McIntyre band (abbr.)
• Boy band that reunited in 2008 with the album "Summertime," for short