GLEE: Shirley MacLaine guest-stars in the “Back-Up Plan” episode of GLEE airing Tuesday, April 29 (8:00-9:00 PM ET/PT) on FOX. ©2014 Fox Broadcasting Co. CR: Tyler Golden/FOX

GLEE: Blaine (Darren Criss, L) and Kurt (Chris Colfer, R) perform in the “Back-Up Plan” episode of GLEE airing Tuesday, April 29 (8:00-9:00 PM ET/PT) on FOX. ©2014 Fox Broadcasting Co. CR: Tyler Golden/FOX [UHQ]