"Yah Mo B There" is an R&B song by American singers James Ingram and Michael McDonald. It was written by Ingram, McDonald, Rod Temperton, and producer Quincy Jones. The song originally appeared on Ingram's 1983 album It's Your Night, released on Jones's Qwest Records label. It was released as a single in late 1983, peaking at #19 on the U.S. charts in 1984, and #44 on the UK charts also in 1984, (the remixed version by John Jellybean Benitez hit #12 in the Spring of 1985 in the UK), and has subsequently appeared on several of Ingram and McDonald's greatest hits albums as well as various 1980s compilation albums.

The performance earned the duo a 1985 Grammy Award for Best R&B Performance by a Duo or Group with Vocals. It was one of a series of very successful duets involving Ingram. It also received a nomination for Best R&B Song, losing to "I Feel for You" (Prince).

The song was referred to in the 2005 film The 40-Year-Old Virgin. The main characters work in an electronics store in which a Michael McDonald concert DVD has constantly been playing on the TVs for two years. A salesman, David (played by Paul Rudd), has developed an intense hatred of the DVD and tells the manager, "Nothing against him [Michael McDonald], but if I hear 'Yah Mo B There' one more time, 'yah mo' burn this place to the ground!"

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