In addition to the 18-year-old, the “Stronger” singer shares son Sean Preston, 19, with ex-husband Kevin Federline.

The Grammy-winning singer, who shares 9-month-old son Jack with Hailey, went viral last month for writing via Instagram that “Mother’s Day sucks ass.” ...

The rapper’s kids took to social media to honor their father with loving posts over the weekend as his sex-trafficking trial continues on.