3OH!3 (pronounced "three oh three") is an American electropop duo from Boulder, Colorado, made up of Sean Foreman and Nathaniel Motte. The duo is best known for their song "Don't Trust Me" from their album Want, which reached number seven on the Billboard Hot 100. Their second single, a remix of "Starstrukk" with Katy Perry from Want, was a top ten hit in the United Kingdom, Ireland, Finland, Poland and Australia. They gained more recognition from their collaboration with Kesha, on the track "My First Kiss", from their album Streets of Gold, which peaked at number seven on the Billboard Hot 100.

3OH!3 formed in 2004 and was named after the 303 area code, which includes Boulder as well as the Denver metropolitan area. Sean Foreman and Nathaniel Motte met in a physics class while attending the University of Colorado. Off of their first album they released one single, "Electroshock".

3OH!3's second album, Want, was released on July 8, 2008. It reached number 44 on the Billboard 200. The lyrics for "Don't Trust Me" have been controversial, as some have accused the duo of misogyny. The song reached number seven on the Billboard Hot 100. The group contributed an original theme song titled "Sex on the Beach" for The Real World:Cancun. 3OH!3 also wrote an anthem for Major League Baseball's Colorado Rockies.

As they were getting started they performed at small venues around Colorado such as the Aggie Theater in Ft. Collins, Colorado, where crowds were lined up outside the door hours before the start of the performance. After playing in Denver during the Warped Tour 2008, 3OH!3 signed on for all venues of Warped Tour 2008. The band performed in Panama City Beach, Florida for MTVU's Spring Break in March 2009, opening for upcoming rapper Sid Hyet. After their spring break performance they came back to their hometown area and performed at The Mile High Music Festival at the Dick's Sporting Goods Center along with other artists such as The Fray, Pepper, and Matisyahu. The band later headlined the 2009 Alternative Press Tour across the U.S. 3OH!3 played at EndFest in Sacramento, California, and was part of Kiss Concert '09 at the Comcast Center in Mansfield, MA. They played at Kiss The Summer Hello 2009 at Coca-Cola Field in Buffalo, New York, June 3, 2009. 3OH!3 joined the Warped Tour once again in 2009. In summer 2009 they appeared at the Reading/Leeds festivals in the UK.

The duo was featured in a 14-page photo spread in Cliché Magazine's "Green Issue" in August 2009. They released a remix of their second single, "Starstrukk," featuring Katy Perry digitally on September 8, 2009. It was a top ten hit in the United Kingdom, Australia, Ireland, Belgium, Finland and Poland. A new song, "Follow Me Down", was written for the compilation album for the film Alice in Wonderland with Neon Hitch. The pair also supported All Time Low, Boys Like Girls, Third Eye Blind, and LMFAO on The Bamboozle Roadshow 2010.

Prior to the release of Streets of Gold, 3OH!3 was featured on the track "Hey" by Lil Jon on his album, Crunk Rock in 2010. They were also featured on the Kesha song "Blah Blah Blah", which peaked at number eleven on the Billboard singles chart. On February 5, 2010, it was announced that Cobra Starship and 3OH!3 would be embarking on a co-headlining tour called The Too Fast for Love Tour featuring labelmates I Fight Dragons. The two month tour covered more than 25 cities, including a date in their home state of Colorado.

Streets of Gold was released on June 29, 2010. Kesha was featured on the first single, "My First Kiss". They are currently on their tour. Later they would start a new tour with Hellogoodbye and Down with Webster, after their international tour.

On August 31, 2010 professional wrestler "Diamond" Dallas Page filed a lawsuit against 3OH!3 for copyright infringement of his trademarked "Diamond Cutter" hand gesture. Page previously filed a similar lawsuit against rapper Jay-Z in 2005, which resulted in Page dropping the lawsuit for an undisclosed amount of money.

On the 8th of December, 2010, 3OH!3 announced their much anticipated song Hit it Again would be released onto iTunes on the 21st of December, 2010. the song had been much requested and anticipated amongst the fans of the band.

The song "I Know How To Say" was used in a trailer for the animated Disney film "Mars Needs Moms".

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