BABYMETAL started in 2010 - they were very young! Now, to celebrate their 15th anniversary, they have rerecorded one of their early singles, "Headbanger" - complete with something they didn't have when they started, death growls from new member Momometal.
BABYMETAL - ヘドバンギャー！！(Headbanger) 15th Night Ver.: https://www.youtube.com/watch?v=R09cXutHYCM
BABYMETAL - ヘドバンギャー！！- Headbangeeeeerrrrr!!!!!!! (2013, original version): https://www.youtube.com/watch?v=2IzR_ClTE8Y