Pop superstar Beyoncé will appear with Vice President Kamala Harris at her event in Houston, Texas on Friday evening, according to three sources familiar with the plans.
Beyonce is also expected to perform, according to one of the sources, who has direct knowledge of the preparations.
The pop star is from Houston and her appearance there comes amid a tightening Senate race between Republican Sen. Ted Cruz and Democratic Rep. Colin Allred.
This is a developing story.