Justin Bieber Will Throw FIRST Pitch!

Justin Bieber, who is in Chicago for a Tuesday "Oprah" show taping, will throw out the first pitch at the Chicago White Sox game against the Kansas City Royals Monday night.

A White Sox spokeswoman told HuffPost Chicago that the young heartthrob would be heading to the mound at U.S. Cellular Field Monday for the opening pitch.

Bieber tweeted about his Chicago trip Monday morning:

"Hope everyone enjoyed their lazy sunday....CHICAGO here we come. Thanks to all of you we are heading to OPRAH!!"

The game starts at 7:05 p.m. Bieber's "Oprah" debut airs May 11.