"I Love You" is a song by South Korean girl group 2NE1 released on July 5, 2012. It was written and produced by long-time collaborator and fellow YG Entertainment label mate Teddy Park, with additional writing by Lydia Paek.

The single debuted at number one on the Billboard Korea K-Pop Hot 100, marking the group's first number one single on the Korean Billboard charts.

"I Love You" was written by Teddy Park, who has written and produced much of 2NE1's previous material, including "I Am the Best", "Fire" and "Go Away". In a press release, YG Entertainment stated that, "Since their debut, they have always done hip-hop, electronic, reggae and R&B. It was time for them to challenge themselves and try something new."

On June 30, 2012, a 20-second teaser video of the group was released on SBS' Inkigayo. On the same day, member Dara posted a message to her Me2day, where she told fans, "To commemorate 2NE1′s release of the new track 'I Love You' on July 5th! Quiz on what genre it’ll be!!! I’ll give you a couple of hints so try guessing~ The correct answer will be revealed tomorrow night!!! ^^ Fighting! This song… is one that all ages will like! Hm… it doesn’t seem like a song 2NE1 would sing…!" The song combined electronic and trot music to create an entirely different sound and a new genre of music.

"I Love You" received its first promotional performance on SBS' The Music Trend on July 8, 2012 and again on July 15. The group was supposed to perform the song on M-Countdown but it was later cancelled after the death of member Minzy's grandmother. They made their appearance on the show the following week instead.

The song received positive reviews from critics. Christopher Weingarten of Spin stated that the song was a "perfect summation of pop's present and future", and compared the production similar to that of David Guetta, especially the use of synths and "ghostly" background vocals, while also comparing the rap-style vocals to that of American singer Kesha.

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