GLEE: Jake (Jacob Artist) performs in the all-new “Dynamic Duets” episode of GLEE airing Thanksgiving night Thursday, Nov. 22 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Jordin Althaus/FOX

GLEE: Marley (Melissa Benoist) is surprised in the all-new “Dynamic Duets” episode of GLEE airing Thanksgiving night Thursday, Nov. 22 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Jordin Althaus/FOX

GLEE: Ryder (Blake Jenner, L) and Jake (Jacob Artist, R) perform in the all-new “Dynamic Duets” episode of GLEE airing Thanksgiving night Thursday, Nov. 22 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Jordin Althaus/FOX

GLEE: Jake (Jacob Artist, L) and Ryder (Blake Jenner, R) perform in the all- new “Dynamic Duets” episode of GLEE airing Thanksgiving night Thursday, Nov. 22 (9:00-10:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Jordin Althaus/FOX