Big crowds are expected for the first official weekend of the Houston Livestock Show and Rodeo.

To kick things off thousands descended on Reliant Stadium Friday night for the Usher concert on Black Heritage Day.  The pop icon also reportedly drew beleaguered pop star Justin Bieber and Selena Gomez to the concert.  

Gomez is scheduled to perform at the HLSR Sunday night.  Saturday night's performance is headlined by country star Chris Young.