"Lock U Down" is a song by American recording artist Mýa Harrison on her fourth studio album Liberation (2007). It was written by Harrison along with Jason Boyd, Dwayne Carter, and Scott Storch, with production handled by the latter, and featured Young Money rapper Lil Wayne. The song was released as the album's official leading single after "Ayo!" failed to find success on the charts or at radio and eventually deemed as a promotional single only. The lyrics of the R&B-collaboration speak of a woman locking her man down when she has found the right one.

The song received generally mixed reviews from contemporary music critics, who found that "Lock U Down" sounded dated and a poor choice as a single. The song was a commercial disappointment, it failed to chart on Billboard’s Hot R&B/Hip-Hop Songs chart; peaking below the chart at number one hundred and number one on the Bubbling Under R&B/Hip-Hop Songs chart only. The song’s accompanying music video was filmed by director Benny Boom. It featured Harrison and Lil Wayne in abandon warehouse. The video made its world premiere on BET’s 106 & Park on April 25, 2007.

Sentinel's editor Brandon Brooks gave Lock U Down a positive review. He called Lock U Down a sure fire hit;complimenting on Harrison's vocal performance saying she has grown up over the years and sound rejuvenated than ever before.

...
Wikipedia