"Ya Di Ya" is a song by American R&B singer, Gina Thompson. It features guest vocals by Missy "Misdemeanor" Elliott and was released as the lead single from Thompson's unreleased album, If You Only Knew (1999).

The song became a minor hit, where it peaked at #38 on Billboard Hot R&B/Hip-Hop Songs and scored Thompson her second top 40 R&B hit and Elliott's fifteenth overall top 40 R&B hit. Because of its strong radio airplay and charting outside the United States, a "Rufftime" remix was issued via international pressings of "Ya Di Ya".

To date, "Ya Di Ya" is Thompson's only single as a leading artist to chart outside of the United States.

The music video for the song premiered in early July 1999 on The Box. It begins with Gina Thompson, alongside background dancers dressed in white, dancing and lip-syncing to the song. Thompson is then seen arguing with the song's antagonist over the phone before throwing the phone in a fish-tank. Missy Elliott is later shown in a silver attire performing her part.

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