Sara D. Anderson of AOL Music said the "provocative, dancehall track nicely fuses Aguilera's powerful voice with Minaj's MC tactics".
[11] Alexis Petridis of The Guardian said, "If you're going to do a five-minute song about cunnilingus, it's a good idea to enlist foul-mouthed rapper Nicki Minaj, whose bug-eyed contribution lends the proceedings an air of gripping abandon.
"[12] Chris Ryan of MTV Buzzworthy called the song "sexually explicit, funky club pop", saying "In Nicki Minaj, Aguilera has found the perfect partner for her erotic-pop adventures".
[13] Bain also said, "If there's one person who can match Christina Aguilera's naughtiness, it's Nicki Minaj, so these two pretty much make a perfect pair for this type of song.
"[13] Stephen Thomas Erlewine of AllMusic said the track had an "incessant title loop piercing like a dental drill" and said it "doesn't work as temptation".
"[2] In his retrospective commentary on the album Bionic, Billboard's Glenn Rowley called "Woohoo" a "raunchy banger",[15] and Mike Wass of Idolator shared a similar sentiment: "'Woohoo' is arguably the most iconic bop ever recorded about female genitalia".
[9] Entertainment-related website Tan's Topic called "Woohoo" a "classic sexual Christina track with a 'Dirrty' dancehall vibe and plenty of naughty lyrics", as well as the "'Candyman' of the 21st century".
[21] However, due to increased digital sales after her performance at the 2010 MTV Movie Awards and the release of Bionic, the song re-entered the Billboard Hot 100 at number 99.
[24] Originally, "Woohoo" was meant to be released as the second single from Bionic in the United Kingdom, but — as Official Charts Company reported — these plans were ultimately cancelled.
[30][31] Tamar Anitai, also of MTV Buzzworthy summarized the performance saying it "was all about her "I-I'm-still-a-diva" vocals, frenzied stage show, and adult-only innuendo...And then this happened.
And that the diminutive diva still has a sense of humor....It's like a little knowing wink that assures you that when she's not changing diapers and doing mommy stuff, Mamaguilera's hanging out at dance party sex dungeons and wailing from the bottom of her light-up hoo-ha.