<Table> <Tr> <Th_colspan="2"> "Gal of Constant Sorrow" </Th> </Tr> <Tr> <Td_colspan="2"> The Simpsons episode </Td> </Tr> <Tr> <Th> Episode no . </Th> <Td> 588 </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> Matthew Nastuk </Td> </Tr> <Tr> <Th> Written by </Th> <Td> Carolyn Omine </Td> </Tr> <Tr> <Th> Showrunner (s) </Th> <Td> Al Jean </Td> </Tr> <Tr> <Th> Production code </Th> <Td> VABF06 </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> February 21, 2016 (2016 - 02 - 21) </Td> </Tr> <Tr> <Th> Couch gag </Th> <Td> The Simpsons family dressed as American football players reunites at the center and get in position, Homer tries to sneak Maggie in as a football but goes over the couch and smashes the wall where he finds the TV remote . </Td> </Tr> <Tr> <Th_colspan="2"> Guest appearance (s) </Th> </Tr> <Tr> <Td_colspan="2"> <P> Bob Boilen as himself Kelsey Grammer as Sideshow Bob Natalie Maines as Hettie (singing voice) Kate McKinnon as Hettie </P> </Td> </Tr> <Tr> <Td_colspan="2"> Season 27 episodes (show) September 27, 2015--May 22, 2016 <Ol> <Li> "Every Man's Dream" </Li> <Li> "Cue Detective" </Li> <Li> "Puffless" </Li> <Li> "Halloween of Horror" </Li> <Li> "Treehouse of Horror XXVI" </Li> <Li> "Friend with Benefit" </Li> <Li> "Lisa with an' S"' </Li> <Li> "Paths of Glory" </Li> <Li> "Barthood" </Li> <Li> "The Girl Code" </Li> <Li> "Teenage Mutant Milk - Caused Hurdles" </Li> <Li> "Much Apu About Something" </Li> <Li> "Love Is in the N2 - O2 - Ar - CO2 - Ne - He - CH4" </Li> <Li> "Gal of Constant Sorrow" </Li> <Li> "Lisa the Veterinarian" </Li> <Li> "The Marge - ian Chronicles" </Li> <Li> "The Burns Cage" </Li> <Li> "How Lisa Got Her Marge Back" </Li> <Li> "Fland Canyon" </Li> <Li> "To Courier with Love" </Li> <Li> "Simprovised" </Li> <Li> "Orange Is the New Yellow" </Li> </Ol> </Td> </Tr> <Tr> <Th_colspan="2"> Seasons </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> <Li> </Li> <Li> 5 </Li> <Li> 6 </Li> <Li> 7 </Li> <Li> 8 </Li> <Li> 9 </Li> <Li> 10 </Li> <Li> 11 </Li> <Li> 12 </Li> <Li> 13 </Li> <Li> 14 </Li> <Li> 15 </Li> <Li> 16 </Li> <Li> 17 </Li> <Li> 18 </Li> <Li> 19 </Li> <Li> 20 </Li> <Li> 21 </Li> <Li> 22 </Li> <Li> 23 </Li> <Li> 24 </Li> <Li> 25 </Li> <Li> 26 </Li> <Li> 27 </Li> <Li> 28 </Li> <Li> 29 </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "Gal of Constant Sorrow" </Th> </Tr>

Who plays the homeless singer on the simpsons