Jacob Scott Sinclair[1] (born March 7, 1985) is an American musician, record producer, singer, audio engineer, and songwriter.
at the Disco, 5 Seconds of Summer, Pink, New Politics, Andrew McMahon in the Wilderness, Gin Wigmore, and Train.
[8] Sinclair received a Grammy nomination for Album of the Year for his work as engineer and bassist on Taylor Swift's "Everything Has Changed"[3] alongside producer Butch Walker.
[9] He co-wrote and produced the debut single, "She Looks So Perfect" by 5 Seconds of Summer[3] that peaked at number one in over five countries and won Song of the Year at the 2014 ARIA Awards.
[10] Sinclair is the former bassist of the indie/pop rock band The Films[11] and the lead singer and producer of the indie pop duo Alohaha.