Betchadupa was a New Zealand pop/rock group. Formed in 1997, in Auckland, the band features Liam Finn, son of Neil Finn, of Crowded House and Split Enz and Matt Eccles, son of Brent Eccles (previously a member of The Angels and Citizen Band).

Betchadupa (originally called Lazy Boy - the name change followed threatened legal action from the chair company of the same name) had its origins when Liam and Matt met whilst their families were on holidays in New Zealand. Their first song, written when both boys were 11, was called 'Gee This Sounds Good, I Can't Believe We Wrote It'.