I'm not sure about Demi Lavato, but Joe Jonas's parents names are Denise and Kevin Jonas.
Denise Jonas And Paul Jonas
Kevin Jonas (Sr.) and Denise Jonas
joe Jonas s hero (s) are his brothers and his parents
joe jonas lives in hollywood with brothers and his parents
27-30
Their Mom, Denise is 42 and their Dad, Kevin Sr. is 43.
Joseph Adam Jonas (joe Jonas) called his old hair dew the JOE-HAWK
Joe Jonas was six years old in 1995.
Joe jonas is 22 years old ( august 1989)
I believe Joe Jonas was 16 years old BELIEVE IT OR NOT
Joe Jonas's parents are Paul Kevin Jonas sr. and Denise Jonas. :D trust me I would know.