We Are Number One (vocals and drums) - Máni Svavarsson, Stefan Stefanson, and the Lazy Town crew
Eridan’s Theme - Toby Fox
Prince of Seas - Max “Imbrog” Wright
Nautical Nightmare - Toby Fox
Violet Prince - DJ 最テー
Those songs belong to those people and/or What Pumpkin and/or Lazy Town and/or the collective hearts and minds of the internet.