sentences:  "Guitar Hero World Tour" introduced a music creation mode that will allow players to create and share songs (excluding vocals) via the "GHTunes" service, which was also used in all other "Guitar Hero" games and "Band Hero" since its inclusion.The creation tools were improved with "Guitar Hero 5" and "Band Hero" to allow longer songs and other means of generating songs in real-time.In the first two games and the 2007 expansion "", the majority of the songs on the main career mode set lists are covers of the original song; for example, a song may be presented as ""Free Bird as made famous by Lynyrd Skynyrd"".