 Cobain chose not to overdub a harmony vocal part during the Smart Studios sessions , possibly due to time constraints . During the Nevermind sessions , Vig had Grohl sing harmonies on the song . Grohl had difficulty hitting the proper notes , but ultimately was able to sing what Vig wanted . Vig often had to trick Cobain , who was averse to performing multiple takes , into recording additional takes for overdubs on the record . The producer convinced Cobain to double @-@ track his vocals on " In Bloom " by telling him , " John Lennon did it . " After doubling Cobain 's vocals , Vig decided he might as well double Grohl 's and had the drummer record an additional track of backing harmonies . 
 Cobain chose not to overdub a harmony vocal part during <a href='None' title='1'><mark>the</mark></a>Smart Studios <a href='negative_concord' title='2'><mark>sessions</mark></a> , possibly due to time <a href='negative_concord' title='3'><mark>constraints</mark></a> . During the Nevermind sessions , Vig had Grohl sing harmonies on the song . Grohl had difficulty hitting the proper notes , but ultimately was able to sing what Vig wanted . Vig often had to trick Cobain , <a href='null_relcl' title='4'><mark>who</mark></a>was averse to performing multiple <a href='uninflect' title='5'><mark>takes</mark></a> , into recording additional takes for overdubs on the record . The producer convinced Cobain to double @-@ track his vocals on " In Bloom " by telling him , " John Lennon did it . " After doubling Cobain <a href='null_genetive' title='6'><mark>'s</mark></a>vocals , Vig decided he might as well double Grohl <a href='null_genetive' title='7'><mark>'s</mark></a>and had the drummer record an additional track of backing harmonies . 
Cobain chose not to overdub a harmony vocal part during Smart Studios no sessions , possibly due to time no constraints . durin the Nevermind sessions , Vig had Grohl sing harmonies on the song . Grohl had difficulty hittin da proper notes , but ultimately was able to sing wht Vig wanted . Vig often had to trick Cobain , was averse to performing multiple take , into recording additional takes for overdubs on tdarecord . Thdaroducer convinced Cobain to double @-@ track his vocals on " In Bloom " by tellin em , " John Lennon did it . " After doubling Cobain  vocals , Vig decided he might as well double Grohl  and had thedaummer record an additional track of backing harmonies .