When JC Chasez Stopped by to Ask for Another Favor 4.96K Brian Moylan 10/28/10 11:20AM Filed to: open caption open caption Justin Timberlake amanda seyfried 'N Sync Los Angeles I'm.mortal bauer-griffin [Justin Timberlake made himself and costar Amanda Seyfried unavailable when he discovered his former 'N Sync backup dancer dropped by the set of "I'm.Mortal" in L.A. Image via Bauer-Griffin]