"Things That U Do" is a single from rapper

Rapping

Rapping refers to "spoken or chanted rhyming lyrics". The art form can be broken down into different components, as in the book How to Rap where it is separated into “content”, “flow” , and “delivery”...

 Jay-Z

Jay-Z

Shawn Corey Carter , better known by his stage name Jay-Z, is an American rapper, record producer, entrepreneur, and occasional actor. He is one of the most financially successful hip hop artists and entrepreneurs in America, having a net worth of over $450 million as of 2010...

's 1999 album Vol. 3... Life and Times of S. Carter

Vol. 3... Life and Times of S. Carter

Vol. 3… Life and Times of S. Carter is the fourth studio album by American rapper Jay-Z, released December 28, 1999 on Roc-A-Fella Records. It exhibits a return to the street-oriented sound of his debut album, Reasonable Doubt...

. It features guest vocals by Mariah Carey

Mariah Carey

Mariah Carey is an American singer-songwriter, record producer, and actress. She made her recording debut with the release of her eponymous studio album in 1990, under the guidance of Columbia Records executive Tommy Mottola, whom she later married in 1993...

 and a beat produced by Swizz Beatz

Swizz Beatz

Kasseem Dean , better known by his stage name, Swizz Beatz, is an American record producer, DJ, rapper and painter. At the age of 17, he gained attention in the hip-hop world through his friendship with rapper DMX. Grady Spivey and rapper Cassidy helped launch his label Full Surface Records...

. Allmusic's John Bush describes it as an "overblown production," while Steve Juon of RapReviews.com considers it a "commercially aimed song" that "still sounds fresh and original." It was neither heavily promoted nor released as a CD single

CD single

A CD single is a music single in the form of a standard size Compact Disc, not to be confused with the 3-inch CD single, which uses a smaller form factor. The format was introduced in the mid-1980s, but did not gain its place in the market until the early 1990s...

causing it to not chart.