Ku qor sii wadida faqradan - Markii la sii daayay "Twenty Ten" Sebastian wuxuu dhammeystirey shuruudaha qandaraaskiisa asalka ah ee Sony, laakiin wuxuu dib ula saxiixday iyaga qandaraas kale oo muddo dheer ah. Wuxuu taageeray Boyzone safarkoodii UK ee 2011, iyo Lionel Richie safarkiisii Australia iyo New Zealand. Waxay dib u duubeen Richie 1983 hal "All Night Long" si ay lacag ugu ururiyaan daadadkii Australia iyo New Zealand
iyo gurmadka dhulgariirka. Heesta waxaa soo saaray RedOne. Richie iyo Sebastian ayaa heesta wadajir u soo bandhigay inta badan riwaayadaha ku yaal lugta Australiya ee safarka. Waxay gaadhay kaalinta 12aad ee New Zealand iyo kaalinta 26aad ee Australia. Sebastian wuxuu helay Abaalmarinta Madadaalada Naadiga Australiya ee 2011 ee Farshaxanka Muusikada Asalka ah ee ugu Fiican, iyo Abaalmarinta Mo ee Farshaxanka Rock ee Sanadka. Waxa uu sidoo kale ku guuleystay Abaalmarinta ARIA ee ugu iibinta badan ee "Who's That Girl", wuxuuna helay magacaabis loogu talagalay Single of the Year, Best Pop Release iyo Farshaxanka ugu caansan Australia. Sebastian wuxuu sii waday inuu garsoore ka noqdo 2011 "X Factor". Wuxuu tababari jiray Wiilasha waxaana ka caawiyay Wynter Gordon iyo Beyoncé xulashada seddexdiisa ugu dambeysa. Reece Mastin oo kooxdiisa ka mid ahaa ayaa ku guuleystay.