British boy band One Direction opened the Teen Choice Awards 2013 show on Aug. 11, with a performance of their latest single "Best Song Ever."

The band took home four awards – Choice Summer Tour, Choice Group, Choice Single (Live While We're Young), and Choice Love Song (Little Things).

Harry Styles' sudden bout of twerking during the show sent Twitter into a frenzy.

Hosts Darren Criss and Lucy Hale encouraged the One Direction member to take a second in the spotlight, and the 19-year-old suddenly broke with a twerk – which is a new dance move involving the hips to move up and down.

The move surprised everyone, including fellow bandmate Zayne Malik, who was seated behind him. Within seconds of Styles' sudden performance, fans took to Twitter immediately and the hashtag "#HarryDroppedThatThunThunThun" of his impromptu twerk started to trend. GIFs and videos of him doing the move quickly went viral

Afterwards, Styles tweeted: "Note to self: Don't 'twerk.'"

Styles also won the Top Hottie and Best Smile category.

See the full list of winners of the Teen Choice Awards 2013 below:

MOVIES
Ultimate Choice: Ashton Kutcher

Choice Movie, Drama: The Perks of Being A Wallflower

Choice Movie, Comedy: Pitch Perfect

Choice Movie Actor, Comedy: Skylar Astin, Pitch Perfect

Choice Movie Actress, Comedy: Rebel Wilson, Pitch Perfect

Choice Movie Actor, Drama: Logan Lerman, The Perks of Being A Wallflower

Choice Summer Movie Star, Female: Sandra Bullock, The Heat

Choice Movie Villian: Adam DeVine, Pitch Perfect

Choice Movie Chemistry: Sandra Bullock and Melissa McCarthy, The Heat

MUSIC

Choice Summer Music Star, Female: Selena Gomez

Choice Summer Song: Miley Cyrus/We Can't Stop

Choice Breakout Group: Emblem 3

Choice Breakout Artist: Ed Sheeran

Choice Female Artist: Demi Lovato

Choice Single by a Female Artist: Demi Lovato/Heart Attack

Choice Rock Group: Paramore

Choice Summer Music Star: Bruno Mars

Choice R&B Artist: Bruno Mars

Choice Music Group: One Direction

Choice Music Tour: One Direction

Choice Single by a group: One Direction/Live While We're Young

Choice Love Song: One Direction/Little Things

Choice Breakup Song: Selena Gomez/Come and Get It

TELEVISION

Choice TV Show, Drama: Pretty Little Liars

Choice TV Show, Comedy: Glee

Choice Summer TV Show: Pretty Little Liars

Choice TV Actor, Sci-fi/Fantasy: Ian Somerhalder, Vampire Diaries

Choice TV Actress, Sci-fi/Fantasy: Nina Dobrev, Vampire Diaries

Choice TV Actor,Drama: Ian Harding, Pretty Little Liars

Choice TV Actress, Drama: Troian Bellisario, Pretty Little Liars

Choice TV Actor, Action: LL Cool J, NCIS: Los Angeles

Choice TV Personality, Female: Demi Lovato

Choice TV Female Scene Stealer: Miley Cyrus,Two and a Half Men

Choice TV Male Scene Stealer: Chord Overstreet, Glee

Choice TV Actress, Comedy: Lea Michele, Glee

Choice TV Actor, Comedy: Jim Parsons, Big Bang Theory

Choice Summer TV Star Male: Keegan Allen, Pretty Little Liars

Choice Summer TV Star Female: Lucy Hale, Pretty Little Liars

Choice TV Villain: Janel Parish, Pretty Little Liars

Choice TV Breakout Show: The Fosters

Choice TV Breakout Star: Blake Jenner, Glee

OTHER

Choice Female Hottie: Selena Gomez

Choice Female Athlete: Gabby Douglas

Acuvue Inspire Award: Nick Jonas

Candie's Fashion Trendsetter Award: Miley Cyrus