Aguilera teamed up with Alex Da Kid ("Love The Way You Lie") for this sassy riot-grrl kiss-off. The American songstress first got together with the British producer on her 2010 collaboration with T.I., "Castle Walls." She and songwriter Pillay then worked with Da Kid to pen songs for her Lotus album, many of which were recorded at her home studio. "I've worked with big and smaller people, and the more established people can get stuck in their ways and say they're not open to critique," said Da Kid of Aguilera to Billboard magazine. "She definitely had a strong opinion, but she'll go with the best idea in the room. That's really rare for someone that's had so much success."