Question:

What number one hit by the county music group Little Big Town describes a "party in slow motion" on a type of boat?

Answer:

Pontoon (2012). The single took off and was the group's first #1 hit single. The band would go on to record many more hits including Girl Crush, Little White Church, and Day Drinking. While previously nominated for Country Music Awards, the group finally won Single of the Year and Vocal Group of the Year for the Tornado album and the hit single, Pontoon.