"Who Is She 2 U" is a song by American recording artist Brandy Norwood from her fourth studio album, Afrodisiac (2004). It was written by Candice Nelson, Walter Millsap III and Timbaland, and produced by the latter two. Built around a sample from Leon Ware's 1977 song "Instant Love", as written by Ware and Jacqueline Hilliard, the song was released as the album's second and final North American single on July 27, 2004, and as its third single throughout Australia and Europe by March 21, 2005.

The single failed to make much impact on the charts around the world; it reached number 85 on the US Billboard Hot 100 and number 43 on the Hot R&B/Hip-Hop Songs chart. Elsewhere, the song reached the top fifty in the United Kingdom, while peaking within the top ten of the German Black Chart. The music video for "Who Is She 2 U", directed by Jake Nava, was filmed throughout Los Angeles, California in July 2004. It features Norwood as an all-knowing narrator, who is watching the central male character's every move throughout the city while catching him in the act with various women.

In June 2002, Norwood gave birth to her daughter Sy'rai. Soon, she resumed work on her then-untitled fourth studio album with producer Mike City and companion Robert "Big Bert" Smith, the latter of which served as the album's executive producer and A&R. He replaced longtime contributor and mentor Rodney "Darkchild" Jerkins, who Norwood felt was not going in the same direction creatively after all, and kept her from exploring her "versatility, [her] creativity and [her] art." The couple eventually finished a number of demo recordings and at least four full songs until late November 2002, and although Smith expected the album to drop by spring 2003 at one time or another, Norwood and Big Bert ended their relationship in mid-2003, resulting in the album's delay and several personnel changes. Norwood eventually decided to scrap most of the project, and instead enlisted producer Timbaland, with whom the couple had previously worked on Kiley Dean's Simple Girl album, as the album's main contributor. Impressed by Timbaland's input, Norwood rediscovered the musical affection, she had missed on Full Moon and its technical priority.

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