Video: Justin Timberlake fires up the 12th Man during Seattle concert

The Seattle Seahawks are collecting celebrity fans faster than Alex Rodriguez running for a Mexican gym. On Friday night Justin Timberlake became the latest musician to champion the 12th Man.

Macklemore and Ryan Lewis will perform at halftime of the Seahawks’ NFC Championship game against the rival 49ers. From the look and sound of Timberlake’s concert, Seattle is already fired up for the contest. The Clink should be rocking.

Seattle and San Francisco square off Sunday at 6:30 p.m. ET on FOX.

[h/t FTW]