The song follows in the inspirational dance-pop theme of The E. D, being built upon the heavy use of Auto-Tune and futuristic synthesizers while running through a tick-tock rhythm.although in fact the tempo does not change at all, suggesting the use of a click track in recording. The "woo-hoo" line is sampled from The Police's song "Every Breath You Take".It was the group's second single to sell over 6 million downloads in the United States, and was certified 7× Platinum on August 25, 2010 by the Recording Industry Association of America (RIAA) signifying sales of over 7 million units.It was the first song to reach sales of over 6 million (July 25, 2010), 7 million (March 20, 2011) and 8 million (June 24, 2012).In March 2011, it became the first song in digital history to sell over 7 million digital copies in the United States.As of September 2017 "I Gotta Feeling" spent 14 consecutive weeks atop the Billboard Hot 100, the longest-running number-one single of 2009.The song was the third most successful song of the decade in Australia, as announced on January 7, 2010.
She last performed with the group at the 2015 Coachella Valley Music and Arts Festival.David Balls, a writer for Digital Spy, gave the song a four-star rating, writing that the song is "every bit as quirky as its predecessor ("Boom Boom Pow")".Ann Powers wrote a positive review about "I Gotta Feeling", noting that "the Peas do let in some human sweetness and light" on the song and that it uses "a repetitive, warm vocal line to signify a good mood coming on." The Observer-Dispatch writer David T.It quickly picked up momentum, moving into the top five in its fifth week on the chart.
On the week ending August 8, 2009, the song peaked at number one, where it stayed for two non-consecutive weeks.
On September 8, 2009, the song was performed (with slight modification) by The Black Eyed Peas for the taping of the Kick-off Party for the 24th season of The Oprah Winfrey Show, with 21,000 fans performing a dance on the "Magnificent Mile" portion of Michigan Avenue in Chicago, Illinois.