With "Justin Bieber fever" being so contagious in my 5th grade classroom, I decided to make new words to Bieber's popular "Boyfriend" song. The lyrics are fast moving and review the concept of erosion. It was a big hit in my classroom. Even the "Bieber haters" were converted. We sang along with the YouTube. You can also find karaoke versions once you get the beat down. Hope you have fun with this activity!