Possible Clues:

• "Just being helpful"
• Macy Gray smash
• 'Just doin' my job ...'
• Grammy-nominated Macy Gray song of 2000
• Modest sentence
• Macy Gray hit from the album 'On How Life Is'
• Humble comeback to a compliment
• Reply that's a bit of a humblebrag
• Tesla "___ so hard to believe"
• Response to ''Good job!''