NASHVILLE (AP) - Pop singer Kelly Clarkson has announced the birth of her second child, a boy named Remington Alexander Blackstock.

Clarkson, a former "American Idol" star, posted Thursday on her Twitter account that the baby was born Tuesday "& he is healthy & we couldn't be happier or more in love." A record label representative for Clarkson confirmed the information.

The 33-year-old Grammy-winning singer and her husband, Brandon Blackstock, also have a daughter, River Rose, who was born in 2014.

Clarkson, a former "American Idol" star, is known for hits like "Stronger" and "Since U Been Gone."