"So Excited" is a song recorded by American singer-songwriter Janet Jackson featuring guest vocals from rapper Khia. It was released in August 2006 on Virgin Records as the second single from Jackson's ninth studio album, 20 Y.O.. The song was written by Jackson, Jermaine Dupri, James Phillips, Johntá Austin, James Harris III, Terry Lewis and Khia Chambers, with Herbie Hancock, Michael Beinhorn and Bill Laswell also receiving songwriting credits for sampling Hancock's 1983 song "Rockit". Production for "So Excited" was handled by Dupri, LRoc, Jam, Lewis and Jackson. "So Excited" is musically a hip hop and dance song which lyrically expresses submission from a woman to her lover.

It received mixed reviews from music critics, with some considering the song the highlight from 20 Y.O. while others found it disappointing. "So Excited" performed poorly on the US Billboard Hot 100, reaching number 90, but managed to become Jackson's seventeenth number-one dance hit in the country. It also was successful in Europe, reaching the top ten and the top thirty in seçected regions. The music video for the song was directed by Joseph Kahn. It depicts Jackson's clothes disappearing through a complex dance routine. After the rapper was given a diminished role in the music video, she criticized Jackson online. Jackson performed the song on Today, the 2006 Billboard Music Awards, and the 2008 Rock Witchu Tour.

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