"Hey, what's so funny?" Sugarland's Jennifer Nettles doubles over in a fit of laughter during a performance on Jan. 7 in New York

Sugarland's Jennifer Nettles

Jennifer Nettles (Sugarland)

Sugarland.... Love Jennifer Nettles!

Jennifer Nettles of Sugarland performs on "CMA Country Christmas" (2012).

Jennifer Nettles of Sugarland

Jennifer Nettles Sugarland

Jennifer Nettles (Sugarland)

Sugarland - Jennifer Nettles

Jennifer Nettles (Sugarland)