JoJo threw the crowd at her recent Los Angeles ... "Y'all better sing." The "Leave (Get Out)" artist - whose EP NGL arrived in January - is currently embarked on her Too Much to Say Tour.

The "Too Little Too Late" singer covered the vocal trio's original song on her 2004 debut album JoJo ... “Y’all better sing.” The “Leave (Get Out)” artist — whose EP NGL arrived ...