Produced by the group's long-time collaborator Yoo Young-jin and Will Simms, the song is described as a hybrid of various genres including bubblegum pop, dance, and electropop.
He’s not good for you,’ and she's like ‘Well, I got a boy.’”[4] On reviewing I Got a Boy album for the same publication, Jeff Benjamin noted dubstep elements on the song.
[6] Meanwhile, Rolling Stone's Nick Catucci opined that "I Got a Boy" was made up of a range of genres from minimal R&B to "high-BPM" dance.
[7] Writing for Time, Douglas Wolk described the track as a "monomaniacally charming" hybrid of bubblegum pop, dubstep, and hard rock.
[12][13][14] The music video for the song was directed by Hong Won-ki for Zanybros, and was choreographed by Nappytabs, who had worked with the group's labelmates TVXQ and BoA.
[15] According to MTV's Liza Darwin, the costumes featured in the music video included streetwear fashion such as Kenzo x Opening Ceremony, Adidas Collection by Jeremy Scott and printed leggings; Stüssy's "Good Vibe" T-shirt, Obey's "OG Basic" crewneck, and Joyrich varsity jacket.
In the sleepover scene, the girls are seen wearing clothes by UK independent label Lazy Oaf, such as a Batman shirt, a "fruity" T-shirt, and a "pizza crewneck".
[16] Clyde Barretto from Prefix magazine opined that the video was "more colorful than a rainbow" and featured "alluring" and "bombastic" dance moves.
"[5][6] Staff writers of Entertainment Weekly picked "I Got a Boy" as Girls' Generation "key track" and recommended the group as one of the fifteen "artists to watch" in 2013.
[2] Following the event, Girls' Generation received a considerable amount of negative feedback from Western audience as the group was not well known in the United States compared to other nominees for the same category including Psy, Justin Bieber and Lady Gaga.
[51] Internationally, "I Got a Boy" became the fourth best-selling K-pop single in the United States in 2013, behind Psy's "Gangnam Style" and "Gentleman" and Big Bang's "Fantastic Baby".